[Ron Ramirez]

The Hippos (at least the 1946-48 models) are definitely Bakelite, and I suspect the 1949 Hippo is Bakelite as well.

With the exception of the 1938 ivory Plaskon 38-12CBI, 38-14CBI & 38-15CBI, all of the Philco table model sets made between 1938 and 1942 that are not in wood cabinets, are in Bakelite cabinets.

Postwar, Philco still made quite a few Bakelite models even into 1950 or so. Some of the postwar Philcos are non-Bakelite plastic, though; such as the 48-225, 48-230, 49-503, 50-620, 50-621, 51-629, 51-631...