I recently picked up, online, a Beretta folder. Only markings on blade are BERETTA on one side and JAPAN on the other. However, the box says Beretta U.S.A. I have a Beretta KB-403 that looks the same with very minor variations. On its blade it says Beretta on one side and SEKI JAPAN on the other. I'm wondering if the K-401 is a knockoff. Is anyone familiar with this knife?