I researched and have a few others helping but so far nothing close to this piece. This is a large antique spring assisted hunting pocket knife. Condition is nice and may be spectacular if it's older than I think. One small blade dent or twist. Spring still has some spring to it.
Lever works like it should. Nice red bone or stag. I strongly believe this is an extremely rare knife!
Previous listing I have numerous people think vintage Japanese but I'm still skeptical. I couldn't find anything like it. The item "Rare Antique Bone Handle Early Spring Assist Pocket Knife" is in sale since Sunday, November 05, 2017. This item is in the category "Collectibles\Knives, Swords & Blades\Collectible Fixed Blade Knives\Vintage Fixed Blade Knives\Factory Manufactured".
The seller is "penelopee2006" and is located in Laramie, Wyoming. This item can be shipped to United States, all countries in Europe, Canada, China, Japan, Australia, Taiwan, Thailand, Hong Kong, Israel, Mexico, New Zealand, Qatar, Kuwait, Bahrain, Malaysia, Colombia, Costa rica, Panama, Trinidad and tobago, Guatemala, Honduras.