Here's an odd one, no markings at all, and a drive mechanism that, it seems, you push in 1/16 of an inch to change direction... or freewheel. The drive is riveted together so I can't clean and lube it properly. The handle is hollow, maybe to use a cheater bar for more leverage? And there is a raised button on the back disguised as a rivet head to push the socket off. Any idea of a maker and timeline?