The price includes a 4% credit card fee. If you pay by check, money order, or bank wire, the discounted price is $3999 delivered within the contiguous United States. 
 
This "spring lock" model, featured in the 1917 AJ Morse catalog, is an intriguing and virtually unknown piece, arguably among the rarest American diving knives ever produced. It was touted for its fast, simple action: "much more easily withdrawn from the sheath than the screw pattern."
 
Its rarity is a mystery, potentially stemming from the high cost of integrating the mechanical lock into the brass handle or a design rejection by the US Navy. Ironically, while the push-button mechanism is quicker than the traditional threaded style, its simplicity may have led divers to mistakenly believe the blade was locked, resulting in losses.
 
The mechanism functions by pressing a spring-loaded trigger on the flat brass handle, which disengages a hook from the flat brass sheath.This Exceptional Example: In near-mint condition with an exceptionally clean blade, this knife is a truly fortunate survival. Its unique look and verified place in the 1917 Morse line make it an immediate centerpiece. Total weight is 3 pounds and 15 ounces.
 
 
The price includes a 4% credit card fee. If you pay by check, money order, or bank wire, the discounted price is $3999 delivered within the contiguous United States.