Vintage Russian / Soviet baltic amber gold plated leaf pin

Vintage Russian Soviet era gold plated Baltic amber leaf pin. Marked with a dot, number 7 with and a backwards R (which, in my opinion, stands for "ja" - jantar, amber). Might be a factory mark, or a number of team who produced the piece.
Maybe Kaliningrad amber factory mark? They made similar items:
https://www.etsy.com/listing/617249109/russian-carved-baltic-amber-brooch-18k
Very pretty, I quite like it.
60s maybe? I think this was a mass produced design.. I saw quite a lot of them sold online.