I have an Armstrong 104 flute my parents bought for me in the early 1970's. Having just acquired a model 80 on ebay, I got interested in the serial numbers. The old model 104 is marked "104G6968". Can anyone tell me when it was made? It doesn't seem to fit in the serial number charts I've seen. The charts don't list a "G" prefix, and they have more than 4 digits.
Thanks,
Jim