Thank you for the responses some pics as requested. Stamped # under truss nut inside on neck block 502055 with a K underneath the stamped number. The white sticker is 0300302 and of course the stamp on the bracing that says PR755S made in Japan. Typical from my research solid spruce top, 3pc back, maple binding and gold tuners. I was led to believe it was the first year of production ... but I don't remember the year. Would love any helpful info and would really love to find a twin for it for some ideas I have. :)
A440