Curiosity finally got the better of me today so I broke open the case, opened up the control cavity and took a wire brush to the pots. The two that don't have blobs of solder over them have date codes of 1377107. Serial number 628557. Seems to fit being a 1971, but I need to read through the Norlin characteristics thread again. I just took for granted that it was a '74 as I had been told. I need to pull this one out more often. I haven't really played it at all since I got it back from a friend of mine but just plugged it in and.....Wow. Pardon the dust and uncut strings, I just threw it on the stand and snapped pictures for someone real quick.