Bulova 1946 Tuxedo

Hello. This watch was left to me by my grandfather. With a little research, mostly from this site. Thanks. I think it may be a 1940's tuxedo. It still works. He wasn't a flashy guy so he didn't wear it much. Let me know what you think and any additional information you can. The clasp on the bracelet says Kreisler 14k U.S.A. The back of the watch says 14K GOLD Bulova

Thanks - Joe