Can you check the number again? I'd expect the 8 is a 0. If so, it was made in Taiwan in May 1972.
More importantly, this was made around the time they added the UPPER serial number on the brace under the fretboard just inside the soundhole. Does it have a serial number there?? If so, what is it??
Any chance you could find the internal date code? It would be on one of the internal walls, most times near a large number in a circle.
Does the Red label say Nippon Gakki? Can you post a picture of the serial number? Assuming the T is a 1 that would make it 10133266, which doesn't work and an 8 digit number since the first 5 digits are a date.
