Press motor help!

I have a old Kimble Electric electric motor, that runs my C&P press, that needs to be wired to the plug & switch. My concern or rather frustration comes from the fact that all that I have is the wiring from the motor which are 4 black wires, not colored.

Each wire is labeled a number, which ranges from 1-4. Wires 1 & 2 are wired together and 3 & 4 are wired together. However, I don?t know which grouping I attach the white wire to and the black wire to for the plug and switch.

Here are the pics. Any help would be great since I cannot find any manuals or info about the motor online since it seems they stopped making them circa 1940?s.

It is a 1/2 horse power, variable speed, 750-2000 RPM, 115-230 volt, a.c. electric motor.

Here is the link for photos of the motor.
https://www.flickr.com/photos/130139957@N04/

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