All the Mountaineer's..... I have seen and All single guard One Piece Knives had the fold over sheaths, not this style. This style was always on the double guard models. Some models like the shadow 3 and aviator had pancake sheaths.. 2 things.... It could have been mixed up either at CRK or at a dealer, OR you can order a sheath from Gffellar or CRK at the time and get a sheath more to ones liking rather than what was original to that model.