YOU ARE VIEWING A VINTAGE SILVER BROOCH FRAME 
HAVING A ROPE TWIST EDGE AND TWO REPLACMENT PERSPEX FRONE AND BACK
WITH OPEN CLASP TO HOLD THESE IN PLACE
MARKED SILVER WITH THE LETTER B
MEASURING  4.2CMS IN DIAMETER APROX
PLEASE SEE ALL PHOTOS AND CONDITION AS THESE FORM PART OF THE DESCRIPTION
I add new items daily and have other vintage silver brooches and pendant lockets with floating glass /perspex front and backs in my shop if you would like to  take time to have a look