In the 50s and 60s, most Oz cars were built without a heater fitted standard.
There was a thriving industry in aftermarket heaters, as the factory approved ones (dealer fitted) were such a ripoff.
If you couldn't afford a heater, you bought a little 12V electric demister that was stuck to the bottom of the screen with suction cups.
An element about 300mm long inside gave off a pitiful amount of heat, just enough to defog the screen above it.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R.
