I've got an A-D i'm working on right now too. THankfully without a stuck seatpost.

Mine uses a standard English/ISO 1" Tange headset and English/ISO sized BB.


Yours is the same color as my '76 Inter-10 (and nearly every other inter-10 out there), and same seat post lug and seat stay attachment style but mine has no braze ons whatsoever...I can see a brake cable guide on yours...

Whats your Serial Number?

Seems like there's only ever 2 models of A-D you see in the states... the Vent Noir and the Inter-10 (Inter-12 in the early 80's)