You might want to post its photo. Thanks.

There are definitely alarms that came with unsigned crowns, typically the earlier ones, say before 1960 or so.

I'm basing my response on what I expect collectors to be interested in. I don't expect collectors to be interested in a round RGP Bulova, even if it is their first windowed calendar, rare or not. Of course I may be wrong and you'll find out soon enough if it's something you're trying to sell.

I can't imagine much value here. It remains a time only Bulova in gold plate.

Honestly I find the smiths movements a little crude.

Nice example!

Around 1948.

Crystal & service no problem, band, I don't have.

Photo?

I have some 815/825 parts, but not all. Clutch wheels being one of them, but I can get them usually. It's just that they're not cheap.