There are 2 bulletins in my United Motors Radio Service manual for 36 Graham-Paige and Cord cars.
Bulletin 6D-M105 covers Cord model A255 and Graham-Paige model A355 radios. From the text: “Both are 5-tube auto radios with header speakers and instrument panel type tuning controls. These receivers were designed specifically for 1936 model Cord and Graham-Paige cars”. Tubes used are: 6D6 r-F Amplifier, 6A7 Oscillator-Modulator, 6B7 I-F Amplifier, Detector and AVC, 76 Amplifier and a 6B5 Output Tube.
Tuning controls were different for each car, as the parts listed for the controls are different and called out separately.
Bulletin 6D-M106 covers Cord model A455 and Graham-Paige model A555 radios. From the text: “Both are 5-tube single unit auto radios” (speaker was inside the radio). “These receivers were designed specifically for 1936 model Cord and Graham-Paige cars and are equipped with instrument panel type tuning controls.” Tubes used are: 6D6 R-F Amplifier, 6A7 Oscillator-Modulator, 6B7 I-F Amplifier, Detector and AVC, 6D6 1st. AF Amplifier and 6B5 Output Tube.
Although it’s not mentioned in the service literature, I’m certain that these radios were made by Crosley. The radio model numbers match Crosley numbers and some Crosley auto radios used the same chassis and general component layout (Crosley model A-166 for one). Also Delco model 626 is almost identical with model A455, and Delco model 627 is close to A255. It’s well known that Crosley made some General Motors (Delco) radios in the 1930’s.
Here’s a link to the service information on the Delco 626. Sorry, I don’t have a picture of the outside of the radio box.http://www.nostalgiaair.org/PagesByMode ... 022432.pdf