I have 2 stepper motors for which I need the specification sheets for each motor.

Motor #1 is marked with the information below:
Type 23HD450Y-31A6
FH 170713 Smooth (with registration mark)


Motor #2 is marked with the information below:
Type 57BHH56P-560A-29
CW No. 2017.04.17

Any help in regard to where to find the spec. sheets, how to identify the motors, the identity of or someone who can identify the motors would be appreciated.

Thank You
Roger