In the late 50s, Seiko did a few belt buckle watches, presumably directed towards the sports/lifestyle market. There is also one with a golf motive on the buckle and a fancy one with a silver buckle. The watch is a 17j Unique. These watches are not particularly rare but valued by collectors and fetch decent prices. This one has a bit of wear and staining on the buckle but the watch looks to be in good shape. It originally came with a belt and packed in a special Seiko travel box. Pics from seller.
/ martin



/ martin