"Mengu Khan" in the top line, "al-Azam" with Mongke's tamgha with an "S-shaped" bar in the middle / "Zarb Bulgar" a slightly different Toluid Tamgha of Mongke. 15mm, 1.08 grams. Singatullina #8. 

The coins in the name of the Mongol Supreme Khan Mongke were struck by Khan Batu toward the end of his reign. These coins were virtually unknown until a few years ago.

Batu Khan (c. 1207–1255) was a grandson of Genghis Khan and founder of the Golden Horde, the Mongol khanate that dominated much of Eastern Europe and the western steppe. A skilled commander, he led the Mongol invasion of Europe (1236–1242), conquering vast territories including parts of Russia, Poland, and Hungary. Batu established his capital at Sarai on the Volga and ruled as a semi-independent khan under the Great Khan’s authority. His reign consolidated Mongol control over the Rus’ principalities through a system of tribute, while maintaining alliances and rivalries within the Mongol Empire. He died in 1255, leaving a powerful legacy as the architect of Mongol rule in the west.