
seems a bit worn, can anyone help me out with identification? thank you
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You have Carl Gustav's initials (CG) on first image. 1654-1660. Polish-Lithuanian commonwealth rulers lost Livonia after 1621 and their initials would have S instead of C or G. Christina of Sweden and Carl of Sweden used CR initials.
SO on second image points at schilling aka solidus. Issuer should be written after “solidus”, but you lost it to time. Key on shield is probably from Riga. Swedish Estonia would have lions or fishes.
Since it is difficult to identify year due to wear, it could also be contemporary forgery.
Radarouton
might be this one?

that hook is supposed to be last digit in year. 1656 or 1655 fit, but in Haljak catalogue 1656 variant has six tilted in a way that should make top hook visible in your image. Other non counterfeit years do not fit.
so it's that one+the year 1656?
Radarouton
so it's that one+the year 1656?
N#31705 from 1655-1660 or contemporary counterfeit. Found entries with year ending with 8 and 0 on other catalogue page.
year 1655 - Haljak id 1545
1656 - Haljak 1546
1658 - Haljak 1550
1660 - Haljak 1552
counterfeits - Haljak 1620-1627.
I suppose it is that coin, thank you.
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