Plate. Persian, Sasanian, A.D. 225–630
Dimensions: 4.8 cm (1 7/8 in.)
Medium or Technique: Silver-gilt.
© The Museum of Fine Arts, Boston.
The original caption reads:
Inside carved in relief and gilded with designs showing the Moon-god, Mah, within a crescent moon, seated above the caonopy mounted on the chariot drawn by four zebus with two driers. Mah is enthroned like a Sassanian king with ceremonial axe, spear and cushions. The figure below is possibly Tishtrya, the first aspect of the constellation, as a young man. below Tishtrya is the tree of life.
According to wiki:
The Sasanian Empire, also known as Sassanian, Sasanid, Sassanid or Neo-Persian Empire), known to its inhabitants as Ērānshahr in Middle Persian language,[a] was the last Iranian empire before the rise of Islam, ruled by and named after the Sasanian dynasty from 224 to 651. The Sasanian Empire, which succeeded the Parthian Empire, was recognized as one of the leading world powers alongside its neighboring arch rival the Roman-Byzantine Empire, for a period of more than 400 years.