TM : mintmark : Feodesia, Crimea, 1787-1788 (that is the first thing that is correct)
Monogram : ruler Catherine II (http://en.wikipedia.org/wiki/Catherine_the_Great) (seems correct)
The coins have good detail, seems also correct.
Krause says :
Note: During the war between Russia
and Sweden In 1788. the Swedish government began to strike
copies of the current 5 kopek piece using a Royal instead of Imperial
crown design. Several dates are known. A common way
to distinguish the wedish forgery from the original is to note that
"kopek" is spelled with a "ь" as a last letter rather than "ъ" as found
on the genuine Issue. Another sign is the 7's in the date which
are straight on the Swedish piece and curved on the Russian originals.
As your coins are not the swedish type, they should be rather rare.
But if they are real? I do not know. They are very nice coins!
http://www.ngccoin.com/price-guide/...-duid-165018























