Here's the story, please bear with me. I bought a used F-30 in 1967 in Victoria, BC. It had been played hard and needed some work but was obviously a fine instrument. After a year or two I traded it to a friend who was going to have it "restored". That restoration, mercifully, was abandoned after the sunburst finish was removed and replaced with a thin layer of varnish. When I found the guitar languishing on his wall in 1977 I quickly re-acquired it and did two things - new tuning heads (an old one was beyond repair) and a complete fret replacement. So - it's not "vintage" but boy is it a great playing, great sounding instrument. There is a Hoboken decal inside that looks like it has seen a little water damage in early times but there is no serial number anywhere I can see. An almost identical 1959 model sold locally a couple of years back for around $2K Cdn and it had a serial number etched in the back of the headstock. Mine has nothing like that. A friend who bought and sold a few Guilds gave his best guess as 1957 but I'm not confident about that guess. Thoughts?