Electro-Craft Motors

:confused: I just received some servos from Ebay made by Electro-Craft and do not know what I have. I've been to the EC site and it was not much help for my novice mind. Can someone help with the specs for Electro-Craft Model 0586-00-012, SN H00776 Described on the motor as a PErmanent Magnent Servo-Tach. Is there a way I can test them and determine what I have. I've ordered encoders to place on them for a CNC project and hope I'm not jumping the gun. Thanks in advance.
Bill in Spartanburg :violin:

did you find a spec sheet for the motor?

On edit: I have an ElectroCraft motor with a similar label. It has a tach which I am going to replace with an encoder. Mine is an E series, P/N E728 39 003. Sorry for the bad information prior to the edit.