What is it? Various items

Those little items with the screw holes and ribs look sort of like "C" pillar trim pieces where a roof comes down to a body. I have seen them before....just cannot remember on what. Is there a "DPCD" logo on them? They look to also have a bird on the front??!!

First 2 photos look like they are 55. 56 Chev steering column trim

Most likely "1964 Rambler American 440 Convertible" for the top switch. I'm pretty sure that was AMC's only convertible in 64.

I see that the "bird" on the stainless parts is similar to this 1955 Chrysler Imperial emblem...maybe it fits an Imperial near that year??

I think 28 Chrysler is right on the identification of part 3719579. I see it listed in my Chev parts catalog for 1955 under group 9.746. There is only one per car and it is described as "COVER, instrument panel steering gear jacket". I think it is a decorative trim piece for the bottom of the steering column. It may also fit 1956, but I my catalog only goes to 1955.

By the way, I have a similar part #3745338 (pictured) which I think is also a steering column cover for a GM application. It is about 10 3/4 inches overall length and appears to be a zinc die cast. I expect this is a bit newer than 1955 - likely late '50's or early '60's, but I don't have parts books for this era - does anyone recognize this one?