Persia, gold coins

These are Persian gold coins. Just asking, anyone seen these in Numista?
Info:
Large one: Square 50 Toman, 401grams
Others: 20 Toman.
Minted in Teheran 1795.

These were used to pay the debt (20mil. silver roubles) of the Russo-Persian war in 1828 ( https://en.m.wikipedia.org/wiki/Russo-Persian_War_(1826–1828) )

Later Nicholas I gave the three in the pictures to a Finnish museum collection.


Book: "Rahakammion aarteita"

Nothing anywhere about them. I guess they are rare.

Are you sure those are legal tender coinage? (the 1st one in particular)

I can confirm nothing, but if they're that rare....

They're not listed in Friedberg's Gold Coins of the World, 4th ed., 1976.

Under Persia, Aka Mohammed Khan (1794-1797), they list only a 1 toman dated AH 1209 = AD 1794.

https://books.google.fr/books?id=A4q58Af5zAoC&pg=PA310&lpg=PA310&dq=&source=bl&ots=287SfSVq1v&sig=g-R0tdaiO0DM_svB-SZ512GoTxs&hl=fr&sa=X&ved=0ahUKEwigt5uEgqXcAhVDXRoKHUqQAfYQ6AEINjAF#v=onepage&q&f=false

Page 310-311 for the full explanation.

The last two are the 20 toman issued during the accession of Aqa Muhammad Khan (end of the first page) and the first one match with a 50 toman too.
They were kept by the Qajars until 1828. After that they have been used to pay a portion of the tribute of 5 millions tomans to the Russians.

I guess part of them were melted after that but some other seem to have at least been preserved by the tsar.