1959 Emerson 555
Micro-table / coat pocket radio, thermoplastic cabinet
5 15/16 x 3 3/4 x 2 inches / 152 x 96 x 50 mm
Four transistors (Emerson, E046, E048, E049, E050), superheterodyne circuit
Four 1.5-volt cells
Manufactured by Emerson Radio and Phonograph Corp., New Jersey
The 555 looks like it was dipped in acrylic — the cabinet's entire front and back faces are thickly "reverse-painted plastic." I can't think of any other radio from any country that shares this distinction. The 555 also came in a black-and-white cabinet color combo, and it sported the same distinctive fluorescent-pink dial pointer found on this version.
The 555 employed a mere four transistors in its circuitry, and so, like most other 4-transistor sets of the time, it called itself an "All Transistor" radio. (Apparently several later versions had 5- and 6-transistor circuits.) Here, the E046, E048 and E049 are top hats, and the E050 is an oval transistor with an aluminum shielding/"heat sink" wrapped around it.
The plastic used for the 555's cabinet, as stated in the Eastman Kodak advertisement shown below, is Tenite Butyrate. "Tenite" is the trade name for Cellulose Acetate. I don't know whether Cellulose Acetate Butyrate is stronger than ABS (Acrylonitrile-Butadiene-Styrene), the typical transistor radio cabinet plastic, but it is much softer and warmer to the touch.
The back face of the 555 nicknames its Butyrate cabinet plastic as, "NEVABREAK," and this same name shows up on the back faces of Emerson's 888-series cabinets, suggesting that maybe the 888 cabinets were also made of Cellulose Acetate Butyrate. (And as with the 555 cabinets, the 888 cabinets are much softer to the touch than is ABS plastic, or even nylon. The "NEVABREAK" name on these cabinets originally had lead many collectors in the 1990s, myself included, to assume that the cabinets were made of nylon, like the Zenith Royal 500 cabinets, but a simple solvent test using acetone or MEK (see my "Plastics" page) shows that nylon it ain't...)