The first was a C15 as produced by GMH with the Australian only "Pie Cart" radio modification. This one was purchased by Jim Edwards who ran the postal contract out of Corryong up to Khancoban. Back in the pre-Snowy Scheme days, the rough and off-road capability of the Blitz would have been handy in this part of North East Victoria.
The third blitz was a C 60 conversion operating in the Snowy Mountains section of Cudgewa yard in the late 1950's/early 1960's in the role shown above - transferring the cement containers from the flat KCC wagons to trucks for onforwarding to the Snowy Scheme sites.
I have prepared an article for Australian Model Railway Magazine on these conversions.