This is a vintage 1920 era bone coke bottle knife. Knife measures5 3/8 inch in the closed position and9 5/8 open position knife has half stops sand good snap both ways. the tangis nice and square.blade is full with a little stubble on end. Blade is saber ground with long pull. Stamping is clear on both front and rear tangs. bone hadle on front side Is nice with no cracks of patches. The back side I see a little epoxy probably filling a crack. All bone is present and solid with no movement.. bolsters ans shield are nickel silver material. Thanks for taking a look