shown here with front cover partially closed
Made by Zenith Radio Corp., Chicago, Illinois, the Zenith Royal 1000D is a large and VERY heavy portable radio (12+ pounds/5.5 kg, I think without batteries), with a nickel-plated metal cabinet and "genuine leather" overlay, measuring
12 5/8 x 10 1/4 x 4 3/4 inches (321 x 260 x 121 mm).
A 9-band radio covering LW 150-400 kHz, MW 540-1620 kHz, and seven short wave bands covering 2 MHz to 22.5 MHz: 2.0-4.0 MHz, 4-9 MHz, and five SWBC bands: 31m (9.4-9.9 MHz), 25m (11.6-12.1 MHz), 19m (15.1-15.8 MHz), 16m (17.48-17.9 MHz, and 13m (21.45-22.5 MHz). It used a nine-transistor superheterodyne circuit powered by nine(!) 1.5-volt "D" cells.
Manufactured shortly after the 1957 Royal 1000, there's little to differentiate the two models, the biggest difference being that the 1000-D added a long wave band. The Royal 1000 series was the first transistorized version of the famous Zenith "Trans-Oceanic" multi-band portable radios that began production in 1941 or '42. And, as found on many of the tube models, the 1000 series had its own "Wavemagnet" detachable antenna, a time zone chart, and a pull-out reception guide and log.
If you're curious about this set, check out the Zenith Royal 1000D page on my Transistor Radios Around the World web site.