Bulova 1921 Lady Maxim

I was intrigued by this one because it was listed as green gold.  After getting it and comparing it to my Lady Maxim that is yellow gold it does indeed look like green gold.  There is an inscription on the inside that dates it as 1921.

I bought some NOS watch band ribbon and a ribbon clasp to go with it.  I can't figure out how the movement comes out so no dial photo yet.

On advertising I didn't find any model names in 1921.  It looks like they sold variations of 15 jewel movements in a choice of white, yellow or green, engraved or plain case, engraved or plain dials.  The ad is from Spokane_Chronicle_Tue__Feb_1__1921