Here are the three types. The major way to tell the rare straight rays printing from the wavy rays printings is that the RA is vertical for the former and horizontal for the latter.
Wavy rays of 1936 (1E1), grainy.
Wavy rays of 1939 (1E3), diffused.There may have been more than one 1E3 used, but I am still trying to figure these out.
Straight rays (2D), diffused.