The company we buy the bags from don’t know .
To be fair they probably don’t care either, they’re just olde fashioned cyclists.
Normally their bags feature pugs sitting on deck chairs.

Er, whilst singletrack attracts a special audience isn’t ‘who are these champions of the road’ the purview of some other forum?

Good shout TiRed. Don’t have a clue without a bit of a Google.
I do know that by 1960 they still all wore National jerseys, but had sponsorship across them, so definitely 1950’s as there is no trade names.

The oldest guy I ride with was a pro about then for Holdsworth and rode for Gt Britain he would probably just know.