These mid 20th century black glass buttons have been in storage for many years, now coming out of hiding to show off their splendour. A dome is surrounded by a series of dots within a millegrain frame.
These buttons were originally sold on cards, but these ones had been removed and badly stored - there is minor wear on the gilding (on the top dome) giving an "antique" finish.
 
One size only, 23mm in diameter.