1. The brown one is the classic "breadbox", and the white one is the revised C64-C. They're identical inside AFAIK.
2. 80s? ;-)
3. Not particularly. In my experience it's harder to get hold of the breadbox. They both look in excellent condition which will increase their value.
4. I'll respond to that with a question: what is the button on the breadbox above the number 9? This is an addition...
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moto
