This rare chronograph supplied to the Royal Australian Navy, as reported by the 11015 assignment on the case back is one of the least-seen military watches on the market and shares its DNA with the SAAF (South African Air Force) cal. 5012.
The RAN version is slightly more recent, circa. 1981, with the updated movement cal. 5100 and the Broad Arrow on the dial. This is one of the very few known specimens