The interesting thing about that rare Ivory phone is that 1) it has a clear plastic dial, and 2) the coiled cord. If you recall, the first 554's (offered in black only) were metal dial affairs and even those had straight cords. Of course, most of the dials, and practically all the cords were replaced along the line as matters of general maintenance/convenience so even early models typically have newer parts. But a cloth coiled cord would not have been part of general replacement parts on hand.
So, I'm wondering if this phone would have any tie-in or was a special release with the 75th anniversary "Imperial" desk model that was a nod to the old 202's but used current 50's tech? Cloth coiled cord, ivory handset, clear fingerwheel. Anyone know?