The "052" being stamped near the lock would likely indicate a key number in my opinion. The "11134" is likely the machine serial number.

Do you have any pictures of the underside of the playfield? I'm curious to see the flipper assemblies.

First thing you should do is measure the coil voltage output from the power transformer. See if it's either 24 volts or 50 volts. If it's 24 to 30 volts, then most of the time Gottlieb coils can be found close enough to work. Sometimes a Williams 24 volt coil will work too.

Judging by the fact the flipper coils only have two terminals, these must be "impulse" flippers so common of that early era.

Those carbon rings for the pop bumper switch were discontinued about 60 years ago and are no longer available anywhere.

Score motor gets oil through the oil holes: one on the front and one on the back of the motor. It's to keep the felt pads satuated with oil. Use 20 weight non detergent or zoom spout turbine oil.