I just worked on the coolest Apple-1.
This is a board that shows no signs of major rework but almost every decrete part including sockets on both the board and ACI are different than every other board I have ever seen in person or in pictures. The board is original and not a replica pre-NTI board but with multi-layer decouping caps. The sockets on the board are wave soldered RN sockets and there is no sign they have been replaced. It also never appears to have had the socket at C1 for the 7404 ever installed. There doesn't seem to be a sign of desoldering. The ACI also has RN sockets.
I asked Woz and he doesn’t remember any blank boards being sold. With some help from Dan Kottke who recognizing his handwriting on a cassette tape included in the set, combined with the dates on the soldered parts, it looks like it’s from July or August 1976.
The regulators look hand soldered and with the undersized heat sink on the LM323k made the screws which were inserted upside down and the heat “erupted” the board silvering around the screw heads. It also appears someone was playing around with the timing circuit and made it variable and did some work on trying to get cleaner -5v to the DRAMs. The edge connector also appears hand soldered since it had some legs bent to hold it in place when it was soldered. It also is a different part number from Cinch that other Apple-1 used. It also has silver 2400uf caps which are date correct and don’t appear replaced. I actually wrote up a document for the owner on everything that differentiates this board from other Apple-1s.
The documentation set included with this was also awesome, it had not only the Operations, Basic and ACI manuals but has a copy of the original Apple-1 Advertisement and full-size ACI and board schematics on archival paper so they are not even slightly yellowed.