Originally Posted by .357magger

First tip off is the hammer. Note the difference in shape between your later variation (Model 20 or pre 20 depending on year made and markings inside the frame/crane) and those pictured as Transitional. Totally different actions between the two.

The Transitional guns are those with pre war action/features but shipping post war.

Your configuration appears to be after the transition to short action and either immediately before or during the era of model numbers rather than names.