I thought that was more the style of the 1930's, and the 1950's was just aluminum wiring? (which fell out of use near instantly after the Beverly Hills Supper Club.)
No, and no.
Knob and tube wiring was still in use as late as the 1960s by some old liners.
Aluminum wiring didn't start coming into vogue until the 1960s when there were dramatic spikes in the price of copper.
Aluminum as wiring has been used for decades, but normally on large-scale applications: service feeders, transmission lines, etc.
This house was built in 1903 and had electrical service from the start.
My Grandparents bought the house in 1943, and in the early 1950s my Father and Grandfather rewired most of it with what is probably the first generation of "romex" type cable. At that time it was cloth wrapped wires in a cloth wrapped bundle and impregnated with a waterproofing agent.
Plastic sheathed Romex type cable didn't come into general use until the late 1950s early 1960s. There's a lot of that in this house, as well.
All that said, things are going well. I've got my pull points through the wall in the kitchen to the basement. Right now I'm deciding where I'm going to punch through the floor in Mom's office.
I'm going to feed the wire down through the floor (using a heavy duty PVC box and conduit) and through the old ceiling in the kitchen. From there I'll run it between the old plaster ceiling and the new drop ceiling to the hole I've drilled in the wall and pull it into the basement.
Getting it from that point to the box is going to be a gold plated pain in the butt, as there is a LOT of wiring running through the joists.
Drilling the joists is going to be another wonderful experience. They're all American chestnut, which is a horrendous pain in the ass to drill. If things go well I should be finished sometime tomorrow, at which time I'll get the AC in the window and get this room cooled off. It's ghastly in here as I'm typing this.