Movement is a 15J BII marked "Bulova W. Co". Case is marked American Standard Warranted 25 years.
The stem is on the side rather than the top. There aren't many on file from this time period that have that and none the look like this.
There's also an odd mark on the movement at about 7 o'clock in the picture. Not sure what that is but it doesn't appear to be a date mark.
I'm guessing Rubaiyat. I'm going with 1922 since that's the date range for the movement.