Really old type would be a steel tube with alloy flanges.. freewheel threads in the steel tube. ..

the axle assembly is pressed in whole (Phil did one for my Bike Garage sale find NOS hubshell)

its end caps were pressed onto a core piece between the bearings .

Was my trusty Touring rear wheel for a decade +... then I built another wheel set with a Bullsye Hubset..

just as serviceable , 2 setscrews back up the hub skewer holding it all together..