The serial number indicates 1970-1972, so if you're 100% sure it was purchased in 1970, then it should be a 1970. In addition to the serial number, the presence of the Made in USA means it shouldn't be any earlier than 1970.
As I'm typing, I see that the pickup covers are embossed. That was a 1972 thing, so my guess would be that it's a 1972 and someone is mistaken about the purchase date (unless the pickups were changed).
Pics of the pots, a closer look at the logo/diamond, and the size of the volute would be helpful as well.
If we can get this moved to the Norlin subforum, those guys are insanely knowledgeable about the most minute details from this era and could probably be more help.