Your are so right! My apologies for not believing you.
My friend Billy, who in spite of being 80, has 20-20 vision with only a vestige of a cataract, immediately said 1665, and showed me where the 5 is!
The reverse lettering might begin SOLID MAG but if so, the SOL is very poorly formed.
I can't see a shield unless the shape behind the rider (which I thought was an angel's wing!) is the shield - is it?
Is Brzesc Brest?
Krause lists mint officials' initials but
where are the mints and identities listed, please ?
Life Fellow, Royal Numismatic Society
My wants list: http://goccf.com/t/283145