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 affects the value of Diamond Superior Multi Purpose Knife?

• 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.