Most Japanese builders didn't use serial numbers in the 60's. When they did adopt serial numbers in the 70's the numbers were usually stamped on the neck plates. The neck plates were then installed at random so there isn't much date of manufacture information that can be gleaned from the serial number. Now the Germans and the Swedes, those are neck plate serial numbers that mean something.
Most likely, your guitar never had a brand badge on it. These guitars were manufactured without brand names and the companies that imported and distributed them put their brand badge on them. Some distributors didn't bother to add brand badges, I suspect your Greco was one of these. 
 It is also possible the headstock badge was removed. When I was a kid my peers and I all wanted Fenders and Gibsons but most of our parents couldn't afford them so we got knock off Japanese import guitars instead. To hide our shame, we would pry off the Japanese badge since no badge was better than a Japanese badge. One of my friends even took a hack saw to the headstock of his Japanese import to give it more of a Fender shape. No one was fooled but it seemed to boost his self esteem 
Statistics: Posted by VintAxe — Thu Dec 27, 2012 5:45 pm
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