Carlton. I have a frame with very similar lugs to the Flyer on ebay. No
Z7650. It is a heavy lump of a thing.(compared to a Gillott) It has the
cable stop loop for c/pull brakes on the seatstays. These bikes would have
had Weinmann Vainqueurs , Mafacs or GB 66's. Mine has been heavily
overpainted . A rub with sandpaper is not revealing any trace of decals. The
detailing around the bbkt lug is plainer. It has a cable guide loop aft of
the chainstay gear stop which I think is a nice touch .Braze ons for 5 speed
only with a triangular stop on top of down tube. Fork crown has long spears
down leg. Main difference is that mine has the typical Carlton wrap over
seatstay where the stays taper to form a 1/4" -ish continous tube. I
suspect mine is not a Flyer but a lesser mortal, judging by the weight. If a
CR member buys the Ebay bike do get in touch with frame number. It may help
date mine.
Mark Stevens in sunny Scotland (Driest September for 42 years)