Re:
It looks 1958 to me, when you get confirmation then... no bets?
Rotrax sold mainly frames, many to retailers, so the original components are not really relevant.
A typical decent spec would have had Campagnolo GS, possibly pedals, TA rings on 49D, Fiamme rims on Campagnolo GS hubs. Brakes Universal or Mafac. In 1958 most used Dunlop tubulars because of free repairs and replacements.
Keith