MHMT PGTAMI Y DAT
From Wikinoah English
The 692CE Sassanian style coin Middle Persian in Pahlavi script is a translation of the Zubayrid governor of Bīshāpūr, ʿAbd al-Malik ibn ʿAbd Allāh [b. ʿĀmir]'s 688CE coin. In English it means:
"MHMT is the Amesha Spenta of Ahura Mazda"
See also:
MḤMT’ PTGMBI Y YZDT’ Yazdânism Tachkastan