
I do not know the year these kits were made as this time. I estimate 1975.
There are 3 videos below.
The Tractor is a M-26 and the Trailer is a M15-A1. This model was my first factory "motorized" scale model kit. "Motorized" kits consist of 1 motor\gearbox\axle with adjustable steering front axle, free running with a on\off switch for control. This type of "motorized kit" is for vehicles with front\rear axles such as cars, trucks, Semi Track. This category of scale motorized kits are not available as "motorized remote control"
There is another category of single motor "motorized" that is for tracked vehicles. I have not built one of those yet but recently got my first one which I will post here in the near future.
The Sherman is a Tamiya kit. This model was my second factory "motorized remote control" scale model kit. I got it in 1978 as well from a local hobby shop. "Motorized Remote Control" comes with dual motors, one for each track and a "wired remote control system"
I have owned this 18 wheel military truck for 41 years It has had a lot of mods and has been with me for decades as I learned how to make scale models radio remote control (RRC).
This M26 was originally designed to be a free running motorized scale model with an on\off switch for motor control.
I never even built it that way back then and never saw it operate that way until just this month when I bought a used one from a seller on ebay. I had to rewire and repair that model but got it running as stock. Here is a video of it running in stock form, this was the best you could do off the shelf in 1978
M26 Tractor in motorized free running mode. This mode is controlled by on\off switch and adjustable steering front axle.
https://youtu.be/h4eyuyEhfVg
The Dragon Waggon was a motorized kit originally but not remote controlled. You turned a switch on and it would go forward and was 2WD only.
Now it has a 2 speed 4WD axle mod with proportional throttle and steering with DSM2 2.4 ghz rx.
The Sherman is about the same age and is an original "motorized remote control" series Tank. It is now a 2 channel radio remote controlled (RRC) model.
Sherman Tank climbing onto the M15 trailer
https://youtu.be/C1t922s7HLE
I just recently got it upgraded (both models) can run together now thanks to DSM2 rx.
Here is a video of the 18 wheel Truck hauling the fully functional Sherman around the Kitchen table track.
https://youtu.be/eYThT6MaZEg