For Sale: Concorde Classic 1990 full bike

Hi rih, going out on a limb here, but I bought one of these exact frames a while back and was wondering if you know the seatpost diameter i need?! Sorry to ask, but the top has been squeezed tight so can't get a proper measure from calipers (also you seem like someone who knows a lot about concorde frames!). Huge thanks if you have any answers to this. Cheers. LP

^^ my Rossin is Aelle and it's 27.0...don't know if all Aelle is the same tho, your LBS can ream it to remove any ovalisation perhaps?