Australian, Post Office Seal

Australian, Post Office Seal, Image & Found by Camille Dack.
Found ?, ? mm.

Raised circular centre crown?, P.(M.G.) curving downward, AUSTRALIA curving upward // 1.3 in sunken centre, (MELB)OURNE curving down, VIC curving up

Identified by Paul Cannon.
P.M.G. stands for Post Master General. An Australian post office seal from Melbourne, Victoria.

See Australia Post, "Following federation in 1901, the colonial mail systems were merged into the Postmaster-General's Department (PMG). This body was responsible for telegraph and domestic telephone operations as well as postal mail. An airmail service was introduced in 1914. In 1967, 4-digit postcodes in Australia were introduced, in addition to the world's first mechanical processing centre, which garnered international attention.
On 1 July 1975, separate government commissions were created to undertake the operational responsibilities of the PMG. One of these was the Australian Postal Commission. It later became the Australian Postal Corporation on 1 January 1989 when it was corporatised into what is now known as the Australian Postal Corporation, or Australia Post."