Karl,
While I've seen a lot of them, the sample size is far from being statistically significant, but within that sample the only exceptions I've noted have been some roadster/phaeton and station wagon outside handles, and trunk/rumble lid handles which were only partially stainless steel with rhe remaining exposed components chrome-plated brass. Lots of the various '33-'34 outside handles were either partially or wholly chrome plated brass by way of comparison. Starting with the '35s, some of the handles for certain body types were originally chrome-plated die castings.