There's a machine I think is *really* worth saving if anyone ever sees one... It's called the HUG 1802.
Its the first computer I programmed as a kid - if programming can be described as keying into a hex keypad a program listing with no clue whatsoever what I was doing, but getting a simple game to run...
The HUG 1802 was an RCA CDP1802 based machine - designed and built by three guys in NZ. I don't know what the U and G stand for but the H stood for Hugh Anderson, who I knew as a student and later worked with at CIT in Heretaunga.
It was a pretty cool machine - I think from memory the ETI-660 (Electronics today international - an aussie electronics magazine) was a copy of this machine.
The machine I used had been purchased as parts and built up based on the HUG specs. If anyone sees one of these they should save it. It was a Kiwi design is my understanding...
It's hard to be accurate about dates going this far back but I'm pretty sure I programmed the HUG 1802 and saved a program / loaded a program from cassette before the ZX-81 was around at least in magazines / at David Reid electronics in Lower Hutt.
Just wanted to throw that out there...