I've got a few, once in awhile I might pick one of them up, but it's been very long since I dared to shave with oneIt's a great little shaver, but takes a bit of concentration. With the tang the same thickness as the thin blade, it tends to want to roll or twist in your fingers. That can result in some uncomfortable results, so care is required. That said, it's quite fun to use.
The top corner of your blade looks suspicious, you should check older pictures to see if the oxidation was there, if not it could be an early sign of cell-rot. It might be time for you to give a second shot at making scales.