Axle Material Steel Shell Material Hiduminium flanges pressed onto steel barrels.
This is seemingly a rare hub from what looks to be an obscure Italian manufacturer from the 50's. Indeed, they'd seem to be so obscure that I can't find enough info on the company to even confirm if they were in business in the 50's, but I feel this would be likely due to the alloy flanges/steel barrel hub design of the hub being commonly in use during this decade, as well as the fact that the hub bears a strong resemblance to the Campag Gran Sport hub around then.