Sweden (Livonia) Solidus

I brought this coin to a local coin dealer a couple of days ago and he attributed it as a solidus from Riga, not Livonia, minted under queen Christina reign.

Your dealer was correct. It is a coin from Riga and its reverse says SOLIDVS.CIVI.RIG[E?] as expected (it's hard indeed to see most of these letters, but the CIVI part is fairly clear).
Alas, the place where the date should be is almost fully cut off by the off-centeredness maybe with a better-resolution scan (or in hand) one could be able to identify the bottoms of the digits (there should be only two IIRC).

PS: Your coin's obverse looks a lot like the one in this link (which is Riga 1651). I can't confirm it, but that probably means your coin is from very late in Christina's reign. Then again, the reverse isn't that similar (and agrees much more with older coins), and DGRS instead of common older DGDRS could be just an error - but maybe it's some intermediate type from 1649 or something: did anyone ever try to survey such minor variations in this series?

PPS: I've checked any examples I could find on Google, but only came to a conclusion that I cannot properly attribute this beyond something like "Riga 1630-1655" The reason? The wheat sheaf on your example is noticeably thicker than on any I've seen during my Google search; if any of you comes across any other such thick-sheaf examples, please note what date they had! (Yes, the legend might narrow it down further, but I've seen 1647 examples with both legends, and didn't care enough to check anything earlier.)

Everything about this one is completely different! For starters, the crown on the obverse doesn't even look close (it's clearly two different versions of crowns). It's also an obvious DGDRS (the OP's coin is DGRS, which was a serious clue in me "attributing" it as 1649-ish).
And as for the reverse, it's apparently a different type entirely, as it spells SOLIDVS.C.RIGE[...] (the OP's has a full CIVI).
(And no, it doesn't have the wide sheaf, either. But that's probably the least of its differences.)

Thanks for the pic though. Now I can be reasonably certain that the OP's coin is from after 1640 (as yours is a clear 1640 indeed); so the revised attribution is 1640-1653 (if 1641 or 1642 examples show the same type as this, that could be nailed down further). I still stand by my guess of 1649 (give or take 2-3 years).

Maybe, one day, someone would make a die database of 1640s Riga (and/or Livonia) solidi the way it is done with ancient coins, and we would finally know the true distribution of DGDRS/DGRS (and DGRES, which seems less common than either of the other two). If so, the die with this wide sheaf would jump out immediately because it is so obviously visible; and we would finally know what year this coin is. But before that, I doubt we could pin it down much further than "1640-1653"

Two of mine coins for grading and maybe year considerations ?...



Thanks