Diamond Superior Multi Purpose Knife Value Guide

The Diamond Superior Multi Purpose Knife is a notable 'Swiss Type' multi-tool produced in Seki City, Japan, during the 1960s and 1970s. It is highly collectible for its ambitious 14-function design, which includes specialized implements like pliers that were innovative for export pocket knives of that era.

What Is Diamond Superior Multi Purpose Knife Worth?

The typical price range for Diamond Superior Multi Purpose Knife is $15 - $25 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Mechanical functionality is key, as the complexity of the 14 tools makes the spring tension and smooth deployment critical for the $25 price ceiling.
• The condition of the red plastic scales, specifically the absence of cracks or shrinkage common in vintage Japanese celluloid-style plastics.
• Presence of the original factory sharpening and the clarity of the four-pointed star logo on the handle.
• Completeness of the toolset, ensuring specialized implements like the pliers and various openers are not broken or bent.

How to Identify Diamond Superior Multi Purpose Knife?

• Look for the distinctive Diamond Brand logo featuring a four-pointed star enclosed within a circle on the handle or blade tang.
• Verify the presence of approximately fourteen folding implements, including the signature integrated pliers and stainless steel blades.
• Check for the 'Japan' or 'Stainless Steel' stamps on the base of the primary blade, indicating its Seki City manufacturing origins.
• Confirm the handle material is the era-appropriate red plastic with brass liners and pins used during the 1960-1975 production period.

History of Diamond Superior Multi Purpose Knife

During the 1960s and 1970s, Japanese manufacturers in Seki City produced high-quality multi-tools often referred to as 'Swiss Type' knives. The Diamond Brand, identified by the distinctive four-pointed star within a circle logo, was a popular export that competed with European brands by offering a high number of functions, such as pliers and specialized blades, at a competitive price point.