Kalloy makes several "nothing fancy but perfectly fine" seat posts. I have used them on many builds, a big plus is the big range of size these are available in, I consider them a good value, if not great lookers.
But you can get into trouble with a caliper (yes, even a Swiss digital model) when trying to get accurate internal seat tube dims. You're better off taking it to a LBS that has a post sizer "mandrel" they can use, maybe even a few donor posts they can try out for the final word on fit.
But do you know exactly what tubing this Scapin is built with, esp. that seat tube?
I never heard of this Geoid model, but Scapin used a lot of the lower priced Columbus tubes (as well as the highest grades) like Gara, Zeta, etc. to cover all the price points
Last edited by unworthy1; 06-30-22 at 01:22 PM.