The L67 is sort of a mystery. Was produced during the War. (see the Snap on design drawing below), never in any of the cats, not even in the ratchet repair supplements. Pat. in the normal round head 2020883. It has the war finish, crude forging. On the collectingsnapon site, shows one with a G date code. I think these were only made in about 44-47, if that. Very hard to find. The model number follows the No. 67 ratcheting adaptor, made during this same time. This would be Snap On's first roundhead.