Three crowns under "C", R-S in fields, mintmark below / Griffin under crown, 1/4 / ÖR in fields (for the denomination), date (1655) above. 29.5mm, 9.39 grams. Avesta mint. KM #211.
These coins were crudely minted with a rolling press, resulting in crude coins which are usually struck off-center. They were made of lower quality silver, with the surface enriched in silver to improve its' appearance. Scarce this nice and with a visible date.