This radio is a prototype for the 1943 production year.  This set never went beyond the development stage because Philco switched to war production in 1943.  Because of this fact, it's assumed that this is the only 43-720T known to exist.  I acquired it from an ebay auction in 2001.

Tube Line Up:
6J8...Mixer / Oscillator
7B7...I.F. Amplifier
7C6...Detector / AVC
6K6...Audio Output
7Y4...Rectifier

Dimensions:
Height...10.5 inches
Width...14.25 inches
Depth...6.5 inches

Frequency Range:
BC...550 kHz - 1600 kHz
SW1...3 MHz - 9 MHz
SW2...9.3 MHz - 12.0 MHz
SW3...12 - 22 MHz
I.F. Frequency...465 kHz

Power Source:
AC...110 Volts

    There are no licenses or serial numbers on the chassis.  All that there is are the following markings in red; RES which stands for Research and the number 720 which stands for the model 43-720.

Information label:
43-720T
Production Drawings
Overall Dimensions
Height:
Width:
Depth: