Jewelry made from circulating silver coins is often found from the WorldWar I period and usually refers to coins from the last years of pre-war issues.
The present product is definitely more interesting, as the youngest coin in the set is an 1866 coin.
The whole bracelet is made of 25 kopiejek 1861-1866 coins. In all probability a Polish product, as the 1 zloty 1839 coin was used as a decorative pendant.
The 25 kop 1854 coin used as a pendant is also a very nice coin.
