This one really caught my attention, as the engraving on the case is still basically all there, and the dial is marked "Bulova". Case back is blank and the inside is marked "American Standard" with Globe, "Warranted 20 Years" and a s/n starting with "10".
Movement is one we seldom see (Bii) and is only 7 jewels. Marked "Bulova W Co." and it runs/keeps reasonable time.
I find one ad the the Db that appears to show this watch and it's dated 1921. Ad appears to show the same engraving and also face configuration. Dial also appears to be the same as this 1920 7J Rubaiyat, except the signature is "Bulova"
Watch is seen as received on a cool period articulated link lapel pin with swiveling double straight pin on back. It's cast - not stamped and although unmarked, I suspect it might be low carat solid gold.....
I'm making an educated guess on the year and leave final ID and age to those panel members better educated in the early ladies watches but this sure appears to me that it could be a 1920 or 1921 Hudson (Lady) Maxim and the earliest watch I've ever seen with a Bulova marked dial.