Similar, with the rounded J-shape above the animal in a circle on the obverse
https://www.africasia-primitive-and-antiques.com/items/1329469/Medallion-Tin-Alloy-Ca-15th-18th
Medallion with a relief design on both sides, a galloping horse on
the obverse, and mythical symbols on the reverse.
Tin alloy, soil incrustations. Siam, Ayutthaya - period 15th to 18th century. Diameter: 6 cm.
Reverse (similar) - the Staff of Hermes: https://en.wikipedia.org/wiki/Caduceus