50cm Colnago Titanio top tube length?

I am looking at bidding on a 50cm Colnago Titanio frame and I am trying to find out what the top tube length is. I have emailed the seller numerous times and no reply.
I am hoping the 50cm has been measured on the seat tube from C to C or I am fucked.
Any help appreciated.

No way to tell without hearing how the seller actually measured it, but I think that Colnago usually measure their frames C-T seat tube. But I could be wrong :slight_smile:

I had one of these sold it for $900 :cry: