Quote: "Grinya"Cycnos, this coin is from Crimea. Usually such coins are classified as Anonymous/ Unepigraphic pul of Golden Horde. E.g. from the catalogue of Mikhail Dubrovsky:

or here (from the catalogue of Roman Savosta) https://aecoins.ru/view/dep/gh/335
Such coins are common among the other Golden Horde. Sometime they attributed as Toqtamysh khan, but there is no 100% evidence of it.
They seem to have been attribuated to the Golden Horde at first, but not all coins of this group have been minted by the Juchid.
As you said some were found in Crimae, but some others in Georgia and in Turkey as well.
The Black sea was a high trading area, so it's normal to find such coins at different places around it. Regarding the diversity of designs, weight and diameters of those coins they were most likely minted by different entities (I guess some rulers wanted to imitate coins that were commonly accepted in this area).
The coin on your picture shows a sun above the "lion" and this animal is not looking backward, so it's a different one.
Some coins of this group have been reattributed to the Beyliks of Jandar and Mentese in the books "Sevgi Gonul Hatira Sayisi" by Izmirlier in 2005 and previously for some others in "Nakisli Osmanli Mangirlari" by Cüneyt Ölçer.
Few others are still unattributed.
Correct me if I'm wrong, but I don't recall they were not a lot of anonymous juchid pul that didn't show at least a tamgha on them.
Regarding the fact that plenty of copper coins minted in the anatolian beyliks are anonymous issues, that makes me feel this type was originally minted in Anatolia and sometimes imitated by the Golden Horde in the territories control by them in the northern and eastern parts of the Black Sea.