I'm so green...these numbers 32/40h mean less than nothing to me!
Up until the 60's british road bikes of this type were built of pretty stern stuff. wheel rims were weaker back then than they are now so they built back wheels with 40 spokes rather than the <32 that we have nowadays. This is a bit of a pain for the vintage cycle enthusiast as 40H hubs are readily available but few people make decent 40h clincher rims to run modern tyres.
Up until the 60's british road bikes of this type were built of pretty stern stuff. wheel rims were weaker back then than they are now so they built back wheels with 40 spokes rather than the <32 that we have nowadays. This is a bit of a pain for the vintage cycle enthusiast as 40H hubs are readily available but few people make decent 40h clincher rims to run modern tyres.