Was this to be a WWII or Korean War Pershing? The Marines didn't get the Pershings until the Korean War, and the first Pershings in Korea with the Corps were from B Co, 1st Tank Bn, attached to 5th Marines during the Naktong defense. They had yellow markings and used the older single pin tracks (I forget the designation). Later, as part of the Inchon invasion, they began to use the dual-pin tracks with the chevrons.

You have the right tracks for an Inchon or later Marine tank. The markings will work, too, since most of the tanks were from 1st Tank Bn (Companies A-C). You even have the metal chevron tracks. All of the pictures that I have found have them using the metal chevrons. The only rubber chevrons that I have found are on the museum pieces.

I've got a couple of small books with a few pictures of Marine Pershings. I'll see if I can scan them and put them here for you. Most are B&W, though. [>:]