Could you post photos of the edge and full photos of obverse and reverse?
I collect coins and tokens which circulated in Africa from 18th century to 2000. I sell about 7000 illustrated world coins from http://www.avscoins.com.
Appears to me to be fake. On your coin, nowhere can I read БМ.АННА to start the legend; looks like ПЕТЕР. The curls and the pearls on the bust do not match Anna's bust in this example: https://en.numista.com/catalogue/pieces51244.html
The reverse looks pretty good, but the bust not so much.
Welcome!!
Gary
Beware of forgeries. But....sometimes they can be valuable, too.
Of course it's a fake. Didn't pay attention to the year at first, was thinking about 1727 Peter II (whose portrait is on obverse) Rouble. 1737 with this emperor is impossible.
I collect coins and tokens which circulated in Africa from 18th century to 2000. I sell about 7000 illustrated world coins from http://www.avscoins.com.