Michael's mum had the Simpson/Bosch shown in the pics, her's has never been used, but has deteriated from age. It was the first plastic tubbed machine I'd ever seen in Australia. I've not been interested enough in it to try and source parts to try and bring it back to life.
Nobody has mentioned the local Dishlex in the list of machines available in the late 70's. I've always wondered what their country of origin is. I've got an earlier one that is more waste king on the inside, but I've never discovered where the late 70's until the mid 90's design was sourced from.