While the responsibility for coining the 1915 Australian shilling fell to the
Royal Mint in London, part of the job of striking the shillings was sub-contracted
to the Heaton & Sons mint in Birmingham. The Heaton coins can be distinguished
by the H mint mark on the reverse above the date.
Mint: Heaton & Sons, Birmingham
Mint mark: H above date
The London mint coins occur in two varieties which differ in the width of the
date. There are no varieties reported for the Heaton coins but I would not be at
all surprised if the same variations occurred in those.
Heaton mint issue.