I have a Raleigh Carlton 10 speed that I bought new in 1967 or 68. The metal plate on the head tube says Raleigh - Nottingham, but Carlton is the only name on the tubes. It's a beautiful red frame with wide black bands on the tubes in which "Carlton" is written in white. "GB" is molded into the casting on the handlebar stem. The handlbar is embossed with GB on one side and and an outline of the British Isles on the other side. The top cross tube says "Carlton Catalina." On the rear fork beside the wheel slot is stamped W8773 which I assume is a serial number. A sticker on seat tube indicates 531 alloy. The original derailleur was a Simplex and the original wheels were steel. The tube fittings are all chrome. It's a classy looking bike. But is it a "classic?" What might it be worth, assuming good condition?