Osmanid ?

[gencho kitov]

Colleagues, please help identify this coin
6 gr. ?! 25 mm.silver very large weight ?!
Mehmed ?
Kostantinie ?

[gencho kitov]

Answer from Zeno:
https://www.zeno.ru/showphoto.php?photo=204696

[Figleaf]

Thank you for keeping us informed. For ease of reference, here is Vladimir Suchy's response:

It is important coin! Yes, mint is Qostantiniye, struck by Muhammad b Ibráhím, denomination is ¼ riyál/ghruš/qirš or yirmi aqčeliq (yirmiliq / 20 aqčeliq). (...) It could be found in Dr. Atom Damali's History of Ottoman Coins - Volume 5, 19-K-G1.

"Double dirham" never existed as denomination in Ottoman monetary system. Dirhem was weight unit. And yes, this coins weighs two Ottoman dirhems. This denomination was regularly struck since Sulaymán b. Ibráhím, but already as machine-struck coin, this one is hand-struck. Its role as currency was very limited, at first.

Like you, I had read Qustantiniye, but for lack of numbers, I had not figured out Mehmed IV, let alone the denomination. Congratulations with a very nice find.

Peter

[gencho kitov]

Thank you Peter
I think the coin is unique.
Best regards.
Gencho.