Compared with the medium tank M4, the T23 featured a much lower hull. Both vehicles used VVS suspension, however the T23 featured a rear drive sprocket. The T23 was not accepted for service due to reasons of excessive maintenance requirements and the potential need to retrain maintenance personnel for its electric drive system, however aspects of the vehicle lived on. The turret formed the basis of the 76mm gun turret seen on the M4 Sherman, and the T26E1 prototype of the M26 Pershing was essentially a heavily-armored T23 armed with a 90mm gun using torsion bar suspension and a more conventional powertrain. The pictured vehicle, however, is not fitted with the production turret shared with the M4 Sherman. This tank is pilot number 2, and the production turret first appeared on pilot number 3. (Picture from Development of Armored Vehicles, volume 1: Tanks.)