Chris Froome is 6'1", weighs 160.
Wiggins is 6'3", weighs 170.
Both would ride a bike larger than a 58.
Easy to believe Confente was shorter and lighter than both.
Well, that's a positive indicator at least. I'm thinking it most likely is exactly as described and so it's history makes it quite unique. Whether this makes this beautiful bike worth that amount is a decision to be taken by someone with a lot more spending power than me!