The Collectors Guide to Switchblade Knives by Richard Langston
George Schrade and His Accomplishments to the Knife Industry Book 1982
Switchblade Knife Information shares new, current and historical information about automatic opening knives.
Rare image of the original cover distributed mostly in Europe.
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Pictured are Butch Vallotton designed Spyderco Sub Hilt and Lil' Sub Hilt dual action folding knives. Butch takes the standard models and converts them to dual action automatic knives. By pushing upward on the front piece of G10 handle material will open the blade automatically. The Lil' Sub Hilt pictured is prototype #01.