This thread, and the other one linked, has opened my eyes to Teimei tsuba. Many thanks. I had one a couple of years ago without knowing what it was, but I think I must have given it away as part of a deal.
The shape of your new tsuba reminded me of square iron hooks hammered into old Japanese building walls and pillars, or those adorning the uprights of shokudai candle holders, but I am more than happy to go with sashigane!