Ad from Dec 1953 MAN
( click on images for larger view )
Ad from Sep 1956 Air Trails
This set uses the rudder and elevator servos that appear in the 1953 and 1954 advertisements.  Later ads show a different model servo like the one in the picture below. The rudder servo is a self neutralizing type.  Elevator is trim only, as the elevator relays do not have wire leads to the NC contacts and the receiver's side mounted connectors for the wiring harness do not provide enough pin connections for such leads. Similarly, the motor relay has only leads to the armature and the NO contacts.  A deBolt three position servo (model 3P) was used to complete the set..
1st generation servo
2nd generation servo
1953-54 Schmidt Radio Controls 5 channel reed set, Model CM-5
click the PLAY button to see it work
click here for full screen
receiver schematic