Old Case X X Pocket Knife Value

Okay, let's tackle this query about old Case XX pocket knife values. The user wants a comprehensive article covering eight specific aspects. First, I need to go through each of the search results provided to gather relevant information. Starting with the first aspect: what is the value and why it’s important. From search result [1], there’s specific pricing info for certain models based on their manufacturing years. The Case XX brand’s history is covered in [7] and [10], which mention their reputation for quality and the XX stamp indicating tempered steel.