Gettys 16-Series DC Servo Motors

I have a few old Getty's DC servo motors that have the old identification numbers and I am unable to locate any cross reference or general data on any web searches.

They are the 16 -xxxxxx-xxxx type DC servos and are in fair condition but I have no exact reference for their voltage, working RPM's, amps, and so forth.

I am looking for the electrical specs in specific or a cross reference list that converts these numbers to the Getty's M13x or M23x numbering system.

Also finding a parts supplier that doesn't ask who I am before quoting me a price for parts would be nice too. I need some brushes and brush holder caps.