You bet it is, 1947 to be exact. It was some time ago that I was studying the schematic in an early volume of Rider. The HV supply is quite unusual in that it utilizes a 5Y3GT as rectifier which somehow manages to supply adequate voltage to the CRT anode; I must confess I didn't understand how this could be done without far exceeding that tube's maximum operating voltage and would welcome an explanation. A second 5Y3GT supplies B+ and the rest of the tubes are miniature 7-pinners, easily making it the earliest set with such a mini majority.
This is Radiolaguy Sonny Clutter's Espey, restored and using the standard-issue 3KP1.