1 vitzfina 1 week ago I've owned a 1965 or 1966 6119 since the early 70's. It was all messed up but mostly original. Over the years I rehabbed it. The serial number however is still a mystery. I only see 3 numbers (163) stamped on the edge of the head stock. I can post a picture of this if GP allows it. Is it possible the serial number means January 1966 and it was the 3rd instrument? How else might I verify dating this relic?