Originally Posted by
JmanBuilder
It is starting to smell like a Miele. I hadn't even thought of Miele which is funny because I own an early-to-mid 1980s, lower end Tange, Suntour/SakaeRingyo equipped model (workmanship, weight and general feel are not comparable between the two frames). The rear dropouts are practically identical. I guess with Miele I expected the usual engraved "Miele" on the fork crown and serial number on the lower seat tube. I'm guessing the model can't be identified with the limited information we have? Perhaps a Lupa? Thanks again for helping out!
As previously noted by Doug, not all Miele models had brand embossing. The Miele models with serial numbers on the lower seat tube tended to be the lower end models that were contracted manufactured in Japan. The bridgeless BB shell and 27.2mm post diameter points to one of the higher end models, manufactured in Canada by Guvin.
If you find some ridges inside the the bottom of the fork's steerer tube, make note of how many there are and whether they are straight or helical, as other manufacturers such as Ishiwata and Tange were employing them by this date, though each had their own configuration.