Seatpost size for Tange Cr-Mo Frames.

[501Brian]

Hi

I have a late Tange Cr-Mo Tony Butterworth frame, possible from the late 90s. It has a Tange Double Butted Decal and 130mm spacing.

I'm trying to work out the seatpost size. it's just a bit too small for a 27.2mm post, Tange frames on Sheldon Brown's database seem to be 27mm

Any ideas?

Cheers.