I have seen 2 wire Romex on dryers but that was when cars had fins. Usually when I saw Romex to a dryer it was 10-3wg. They hooked the white to the silver lug in the receptacle and used the ground on the box/backstrap. I was told it was because a (WWII) dryer/range was grounding to the neutral and the neutral had to be white. SE was the exception if the AHJ would take it.
My 1963 era house has 8-3wg Romex to the range. It is still the original 3p crow foot. I bought a cooktop that is pure 240v.
