I have a 10413, just marked Timberline Knives, Taiwan 10413. Bought new about 15 years ago at show without box, no further details. Black Zytel scales with rubber insert. Steel unknown. Great design - fits my hand like a glove. Edge a bit difficult to sharpen. Blade opens out of the pocket smoothly and as reliably as with an Emerson wave feature except out of the most slippery nylon type cloth. You couldn't tell by just looking at it. Salesman demonstrated opening it out of the pocket against the pocket seam to me, warning one must make sure there is no one behind one. Just then another sales assistant passed behind him. He didn't see, too fast for me to warn - sliced her arm open, blade looked like it just feathered against her arm, but left deep nasty cut. She fainted, needed stitches. Still got ugly scar on the arm.