Originally Posted by
unworthy1
Since it's a custom from a US builder, I wonder if it was from a Proteus "kit": they supplied a lot of Reynolds tubesets with the lugs and bits of customer's choice. Proteus/Paramount, both same initial.
Don't think so, doesn't look like their parts. I think the "built" referenced by the OP was referring to building a bike from parts, not building a frame.