Carlton longfellow (1966?) frame number

darkhorseJJ

I have recently acquired a Carlton longfellow, its in pretty good shape, I'm hoping I can get the frame back looking its best in Flamboyant green! (looks a bit like this one, but not such good nick http://www.theoldbicycleshowroom.co.uk/ ... 2169-p.asp). The code on the williams crank (ZG) dates it at 1966. The frame number on the rear offside dropout is Z3002 but I can't find any reference to this letter for any year. Any ideas?