1947 Hobbs of Barbican Clubweight Build and many other old builds

Tyres are here.
Amberwalls in 26 x 1 x 1/4" aka 597mm are pretty much obsolete.......
Don't choose this size people! Go for 27 x 1 1/4" instead.

but this frame would not take 27" wheels no? built for 26"?

What valves should the tubes have? Woods/Schrader/Presta?

i would say Woods. most bikes i have owned from this era have had Woods valves.