Deep Bronze Green gloss era:
In the 1950's the Australian Army fleet were painted Deep Bronze Green gloss from the factory, as per the British M.O.D. fleet colour of the time. Likewise, when the 1958 supply contract was awarded and the Series 2 Land-Rovers were delivered to the Army they also met this colour requirement and were Deep Bronze Green. As well, this colour continued with the supply of the AMF spec Series 2A Land-Rovers. But only those made before April 1967.
Australian Olive Drab satin era:
In April 1967 the scheme changed. The fleet colour scheme changed to an Australian Olive Drab flat colour that was more appropriate to war service in Vietnam (Mekong River colour?)
More info here
http://www.remlr.com./. Look under Restoration Information and Series 2 1/4 Ton section.