Six digit telephone (dial) numbers.
Adding machines and cash registers using a hand crank.
Bus rides for a nickel.
TVs in black and white only.
Crystal radios (no batteries!)
45 rpm singles
33 1/3 rpm LPs
No such thing as FM radio.
OUTHOUSES
Steam trains (with their whistles waaaay off in the distance)
Penny bubblegum machines with ROUND bowls.
Matchbox cars (in steel only)
Chasing the ice wagon for a chip of ice in the summer.
Glass milk bottles delivered to your door with frozen milk poking through the cardboard coin-shaped top.
Coal rooms in the basement next to a huge coal furnace.
Wood stoves in the kitchen

And finally, the Chevy Fleetline!
https://cdn.dealeraccelerate.com/motorious/5/91450/2964689/790x1024/1950-chevrolet-fleetline