I never knew the evap coils were changed to the exposed, angled design for 55 in the GE and that the earlier models werent the same. Ive always thought of them as a drawback of my 55 Combination. IMO it really cuts down on the available height to store tall items on the top shelf. And if anything happens to touch them it will act like a wick and cause water to run down it and drip off. Seems they took a step backward with this design considering earlier models coils werent exposed. I wonder if consumers complained about them at the time?
In comparison my 54 Frigidaire has them mounted flat at the top of the compartment and I believe covered by a plate. My 55 Philco has the coils mounted vertical on the upper back wall of the compartment and are covered by a plate.
The Frigidaire and Philco make it possible to use all the available height between the top shelf and "ceiling" for tall items. GE engineers had to realize the drawback of the new design at the time.