Three crowns under "C", R-S in fields, mintmark below / Coat of arms of the Vasas under crown, 1/4 / ÖR in fields (for the denomination), date (1641) above. 29.5mm, 9.26 grams. Säter mint. KM #160.
Rare in such high quality.
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.