by Haydamaka Fri Nov 13, 2020 6:36 am
Thank you, Paul, for your reply!
Some interesting facts about the Australian "dog-tags"...
An octagonal Australian Defence Forces identity disc (the so-called "dog-tag") is to be threaded through the laces of the left boot. As distinct from the US, Canada, UK, Germany, Switzerland, Belgium and other countries, the Australian military identification tags set consists of two differently shaped discs, made of oxidised (black) brass.
The discs are shaped in the octagonal and round forms, respectively. The ADF set is provided with 2 ball chains of steel: 60 cm and 11 cm long. The hexagon-shaped disc is to be placed in the lower part of the left boot's lacing, while the round-shaped "dog-tag" is to be worn on the neck chain.

More info:
http://cartalana.com/002-03.php#0094ba