Well, the face is marked "Rubaiyat" so I'll go with that. Your guess is as good as mine on the date.
The movement is a 15 J 10AI. The date range for that movement is 1921-1923. Its marked "Bulova W. Co." which makes it pre-April 1923.
The case is American Standard, 25 yeas, 14K gold filled, "monogram quality". I've read that the "Rubaiyat" signature on the dial might put it in the earlier part of the movement range. So maybe 1921? The ad is 1919.
It obviously engraved on the back. It runs and keeps time.
You guys might notice the markings on the rim in the case around the movement. I can't remember who but someone else pointed these out on another watch I submitted. At least on that one, they seemed to be significant.