There are several versions of this regulator. They all have the same basic casting on the back plate:
692U
Model-C
W.P. 250 psi
W.C.O. 31 lbs

This can make identification difficult. The major differences are the location of the coolant/LP ports and if they are electronic or vacuum controlled (open or closed loop). Other differences are adjustment screws and drains.

Specific features on this regulator:
Main Electric Lock-off
Slow (Idle) Electric Lock-off
NO Pressure Adjustment Screw
NO Drain Valve