Australian, Railway Seal

Australian, Railway Seal, Image & Found by Treasure Tib Tibbett.
Found in New South Wales, Australia, ?mm.

Raised circular centre possible marking top right, inscription around border - P.M.(G?) curving downward, AUSTRALIA curving upward // III in sunken centre, inscription around border - ...U..I(R?)W.. curving downward, ...T.. curving upward

Thought to be an Australian railway seal.

Photo info