KIM-1 serial nos, etc.

My first KIM-1 (from Computer Components, L.A., CA, in 1977) is marked much the same as Marvin describes: It is a MOS KIM, the component side has etched Rev. A, and beneath the KIM-1 logo is etched EC - 715. Beneath that is what looks like a round QC inspection stamp, ?CC 201 ECI in the circle. The earliest chip is a NatSemi LM565CN (7340). The 6102s are all '76, as are the 6502, and both 6530s. The solder side has that 'rubber stamp' looking number between the edge connectors: 3879 [*not* the date] in whitish ink, and to the right is a partially obscured stamp in black, ending in 15. Near the top right is another 'QC' stamp, a circle enclosing ACC, 201, ????. Below this is a partial sqaure stamp, barely readable, with the letters 'est' visible. Below *that* is a partial triangle stamp, not legible at all. Perhaps this will help others out there in dating KIMs.... I tried slicing into the card to count the rings, but the results were inconclusive. Cheers John