Did all the MK2 Raleigh's use that Aero style frame?
No, not a Tange made full cro-moly aero frame they didn't. That was only on the top of the range Aero Pro Burner. The Koizumi framed Mk2 Cromo Burner is also quality.
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All other Mk2's all have the Raleigh made(?) aero oval tubing with the R cutouts on the fork and rear dropouts, and are rather less well thought of round these here parts. Of course we lubs em on Burnerworld