My Gazelle was originally intended to have the lamp wiring through the frame. There's a generator braze-on on the fork and a hole for the wire drilled through the lower head lug into the downtube (yuk!). The exit hole is drilled into the chainstay just in front of the dropout. A terrible thing to do to a 531 DB frame.
Leonard Bulger
Ann Arbor, MI
cold and dark outside right now