BigEd wrote:
Very nice! In good condition too - I'd be inclined to keep it that way, in the sense of feeling free to use it but not to start modifying it.
In the long run, when you're done with it for whatever reason, it can hopefully go to a museum or another enthusiast or collector.
I’m not going to modify it or attempt to power it, although I see no reason why it shouldn’t work. Everything appears to be intact.
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I see a number of '77 datecodes, which is unsurprising - but what are the datecodes on the 40 pin devices? Are they a bit earlier?
The 6502 (see third photo in the series) has the date code 0178. One of the two 6530s is also 0178. The other is 0278. The PCB appears to have the date code 12-77. There is no evidence of any rework to the unit, so I’m inclined to think the chips are all original, thus putting the assembly date in January 1978 at the very earliest. However, the PA7901 stamp below the KIM-1 legend could be a production date code. I’m not familiar enough with the history of the KIM-1 to know what that might mean.
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I am mildly curious as to what modifications or improvements the various revisions made.
Unfortunately, we couldn’t find any documentation her father might have had for the unit (an aside: I knew her dad from my music activities, but had no clue he was interested in computer hardware—to say I was astonished when I saw what was in the static bag is a gross understatement). There are no bodge wires anywhere, so perhaps the Rev F means earlier design changes that were implemented with bodge wiring were rolled into a new PCB layout.
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My wife would likely throw it away, as she thinks I already have too much computer junk. 
