This would be mid 70s. There used to be one of these on display at Bendix importers in Brunswick, Melbourne, it was labelled that it came out in 1973. They had two other machines too, a huge Bendix washer from late 50s assembled by James Kirby co in Sydney, and a tiny early 50s machine.
My mother had a very similar machine but the 550 spin model. This is the 850 spin model - it is labelled the Cyclotron 850. A fabulous machine.
The stainless steel door on Mum's was actually a thin stainless skin over a painted steel door frame.
The machine was extremely reliable, I picked it up from the roadside in a nearby suburb, gave it to my parents as their machine was on its last legs. There was nothing wrong when I picked it up, it was chucked out I assume because its paint was very yellowed and it looked old fashioned. (up market suburb...) It only died when one of the rocker switches burned up, giving Mum a fright and she didn't trust it any more.
It was great to use. The "timer" knob (RHS) is just a pointer, to start the machine you press the rocker switch labelled "start" and hold it down. The pointer would click its way around the dial, when it got to your selected cycle you would release the switch and it would start at that point. The other knob (LHS) allows you to select 7 different programmes.
As Mum only washes in cold water, she would hold the button down till the pointer was past the heating phase of the wash.
They were made in Italy by Philco.
Chris.