Art Deco pianos occupy a sweet spot for both collectors and musicians: sculptural furniture with real musical utility. A fine quality solid wood Knab (often encountered as Knabe or Wm. Knabe & Co.) upright console from the 1930s–1940s embodies that blend—streamlined geometry, handsome veneers, and a compact form that fits modern rooms. This guide explains how to identify, date, evaluate, and appraise such an instrument with the rigor antique and art enthusiasts expect.
Identity, Branding, and Dating
Before you can assign value, pin down who made the piano and when.
Maker name: Many consoles from the Art Deco period are labeled “Knabe” or “Wm. Knabe & Co.,” a historic American brand founded in the 19th century. During the Depression era and after, Knabe became part of Aeolian-American, and production shifted accordingly. Some consoles may show “Knabe” on the fallboard (key cover) and additional Aeolian markings on the cast iron plate.
“Knab” vs “Knabe”: The flowing Art Deco script and wear can obscure the final “e,” leading some owners to read “Knab.” Cross-check the interior plate casting and the soundboard decals—these usually spell the full brand. If the instrument truly carries “Knab” consistently on plate, decals, and action, document it thoroughly; it may be a less common label or a regional stencil.
Serial number: This is the primary dating tool. Look:
- Stamped into the cast iron plate near the tuning pins (often top right under the lid).
- On the plate’s treble side, bass strut, or under the key slip.
- Occasionally on the back posts or stamped on the soundboard. Record the serial and consult reputable serial number lists or reference books for production year. The serial is essential for distinguishing pre-Aeolian from Aeolian-era instruments.
Model and dimensions: A console piano typically measures about 40–43 inches tall, ~57 inches wide, and ~23–25 inches deep. If yours is 36–39 inches tall, it’s more likely a spinet; 45–52 inches suggests a studio or full upright. Measure to confirm.
Factory features for era confirmation:
- Deco-era consoles often have a “waterfall” lid edge, stepped moldings, and symmetrical geometric veneers.
- Hardware may be chrome or nickel rather than brass, aligning with 1930s–40s design preference.
- Keys may be original ivory (pre-mid-century), or early plastics such as celluloid or ivorine. Ivory has a visible hairline join about two-thirds toward the back of the white key.
Documenting these markers with clear photos will strengthen any appraisal file or catalogue entry.
Design, Materials, and What “Solid Wood” Really Means
Piano cases are complex laminations. Understanding what’s “solid wood” and what’s veneer helps avoid over- or undervaluing.
Case construction: Even high-quality pianos use a combination of solid hardwood for structural parts (back posts, key bed, top lid framework) and veneer over plywood or lumber core for large show surfaces. A console marketed as “solid wood” is likely solid hardwood framing with premium veneer faces (walnut, mahogany, or occasionally exotic woods like Macassar ebony). The quality lies in the selection and matching, not just the species.
Art Deco styling cues:
- Waterfall or radiused top and sides.
- Stepped front rail and geometric pilasters.
- Bookmatched veneers creating mirror-image grain patterns.
- Minimal carving; sleek surfaces; sometimes contrasting border inlays.
- Chrome, nickel, or Bakelite-like knobs for the fallboard and panel.
Finish: Original finishes are usually nitrocellulose lacquer in satin or semi-gloss. Sun-fading (mahogany going brown, walnut going amber) and alligatoring often occur with age. Well-preserved patina can be desirable; heavy uneven sun bleaching or opaque spray-over refinishes reduce appeal.
Bench: A matching deco bench with the same veneer and leg style adds value and completeness to the set.
Musical Construction and Performance Expectations
Consoles are designed for domestic music-making, not concert projection. That context matters for value.
Scale and tone:
- Shorter string length than studio uprights, yielding a focused midrange, lighter bass, and a pleasant singing treble at moderate volumes. Perfect for parlors and apartments; less suited to large rooms.
- Expect a lyrical midrange if the soundboard is healthy and the hammers are not deeply grooved.
Action and keys:
- Console actions are full actions mounted slightly lower than on taller uprights. Proper regulation yields responsive touch, though not as powerful as taller studio uprights.
- Check for key dip consistency (~10 mm typical), smooth return, and tight bushings. Sticky keys or sluggish repetition point to felt compression or dirt rather than fatal flaws.
Soundboard and bridges:
- Look for tight, clean ribs, and inspect bridges for hairline cracks at the pin line. Minor soundboard cracks that do not buzz are common and usually not catastrophic.
Tuning stability:
- Pinblock condition governs whether the piano will hold standard pitch (A440). Test tuning pin torque; a professional will assess whether pins are still snug. In borderline cases, one-size larger pins can extend life.
Weight and handling:
- A console typically weighs 350–450 lbs. Always plan professional moving, especially for stairs. Improper lifting can fracture legs or twist the case.
Appraisal Factors and Market Value Ranges
Appraising an Art Deco console involves balancing brand reputation, originality, condition, and local demand.
Brand period and provenance:
- Earlier, pre-Aeolian Knabe instruments often command a premium among collectors, but many Deco consoles are Aeolian-era and valued for style and home use. Clear documentation of the production period and any provenance (e.g., bill of sale, family history, showroom label) adds credibility.
Originality:
- Original finish in good condition is desirable to decorative-arts buyers. Refinished cases can look excellent, but heavy sanding can soften crisp Deco lines.
- Original ivory affects collectability but carries legal and logistical restrictions. Replaced keytops with quality plastic are acceptable and practical.
Condition tiers (typical private-sale ranges, assuming a known Knabe-line console and healthy structure; markets vary):
- Needs work (won’t hold pitch, significant case issues): often a giveaway up to $500–$800 mainly for décor or a restoration candidate.
- Playable, tuneable, clean case with cosmetic wear: $800–$2,500.
- Well-regulated, recently serviced, attractive original or professionally refinished case: $2,500–$5,000.
- Exceptional Art Deco veneering, documented provenance, top-tier restoration: $5,000–$10,000+. Highly stylized Deco cases and uncommon veneers can push values upward for interior designers and design collectors.
Restoration economics:
- Action reconditioning (hammers, shanks, regulation): $1,500–$4,000.
- New strings and pins: $1,200–$3,000.
- Cosmetic refinishing: $2,500–$6,000 depending on veneer complexity.
- Expect a full, sympathetic restoration of a console to run $4,000–$12,000. Restoring purely for resale profit is risky; restore for personal enjoyment or when the case is exceptional.
Regional demand:
- Urban markets with active design communities tend to value Deco instruments higher. Rural markets may undervalue uprights of any type. Appraise with recent comparable sales in the same region.
Inspection Protocol for Appraisers
A disciplined inspection process yields defensible conclusions.
Exterior and structure:
- Examine veneer seams for lifting, splits, or poorly matched patches.
- Sight down the case for racking or twist. Check leg joints and toe blocks for repairs.
- Confirm lid, fallboard, and key slip hardware are original and operating.
Interior and plate:
- Photograph the plate medallion, serial number, and any manufacturer decals.
- Inspect tuning pins for uniform depth and rust. Light oxidation is normal; heavy rust suggests damp storage.
- Check bridge caps for cracks around bridge pins. Tap for buzzes.
Soundboard and ribs:
- Look for separated ribs (paper shim repairs are common and acceptable if tight). Note any visible daylight in cracks and test for rattles when playing.
Action:
- Remove the fallboard and action to inspect hammer wear (groove depth), center pin tightness, and damper timing. Note moth damage to felts.
- Play chromatic scales to feel regulation consistency. Listen for double-striking or sluggish damping.
Keys and ivories:
- Identify material. If ivory, document key count and condition of heads and tails. Many jurisdictions restrict sale or transport of ivory items; note compliance needs.
Bench and accessories:
- A matching bench, original caster cups, and key to the lock raise completeness and buyer appeal.
Care, Compliance, and Risk Management
Owning and selling a Deco console involves responsibilities beyond aesthetics.
Environmental care:
- Maintain 40–50% relative humidity and stable temperature. Use a room humidifier/dehumidifier or a piano humidity system as needed.
- Tune 1–2 times yearly once pitch is stable. After moving or string replacement, allow settling before final tuning.
Finish preservation:
- Keep out of direct sun to prevent veneer fade and glue-line failures. Dust with a dry microfiber cloth; avoid silicone polishes that complicate future refinishing.
Legal considerations:
- Ivory: Regulations vary by jurisdiction and often restrict interstate or international sale of ivory-key instruments without specific documentation or exemptions. When in doubt, keep transactions local and consult applicable rules.
- Endangered woods: Some exotic veneers fall under trade restrictions. Identify species where possible and avoid international shipment without proper permits.
Moving and storage:
- Always use professional piano movers with proper boards and straps. Avoid storage in garages or basements prone to humidity swings.
A Concise Practical Checklist
- Verify branding: Photograph fallboard, plate, and soundboard decals; confirm “Knabe/Knab” spelling across parts.
- Record serial number and location; consult reliable serial references to date the piano.
- Measure height to confirm “console” classification (~40–43 inches).
- Document veneer species, finish type, and Art Deco design features (waterfall edges, chrome hardware).
- Assess tuning stability: pin torque, recent tuning history, and current pitch.
- Inspect soundboard, bridges, and ribs for cracks or separations; note any buzzes.
- Evaluate action: hammer wear, regulation, key bushings, damper function.
- Identify keytop material; note any ivory compliance issues for sale or transport.
- Photograph matching bench and any original accessories.
- Estimate restoration needs with cost ranges; compare against local market comps before committing.
Frequently Asked Questions
Q: How can I be sure it’s a console and not a spinet or studio upright? A: Measure the height from floor to top lid. Consoles are about 40–43 inches. Spinets are shorter (roughly 36–39 inches) with a drop action; studio uprights are taller (45–52 inches) with a more powerful sound.
Q: Does “solid wood” make this piano rarer or more valuable? A: High-quality pianos use solid hardwood frames with veneer faces. What matters is craftsmanship: well-executed veneers, tight joinery, and original finish condition. “Solid wood” alone does not confer rarity without design merit and overall condition.
Q: Should I refinish the case before selling? A: Not automatically. Original finishes in decent shape often appeal to collectors. If the case has severe damage or mismatched prior repairs, a professional, period-correct refinish can enhance value—especially on strongly Deco cases. Get estimates first; you may not recoup full costs.
Q: Are ivory keys a legal problem? A: They can be. Many places restrict sales and transport of ivory, with limited exemptions. Keep transactions local when uncertain, and document the instrument’s age and materials. Replacing ivory with modern keytops is common for playability and compliance.
Q: What is a realistic value range for a Knabe/Knab Art Deco console? A: Depending on brand period, condition, originality, and market, expect anywhere from low hundreds for non-functional examples up to $5,000–$10,000 for top-condition, highly stylized Deco instruments with quality restoration. Most clean, playable examples trade between $800 and $5,000 privately.
A fine quality Art Deco upright console—especially one with crisp lines, bookmatched veneers, and documented history—can anchor a room and invite daily playing. With careful identification, disciplined inspection, and a realistic view of restoration costs, you can appraise, collect, or sell a Knab/Knabe console with confidence.
