Seen from the front it was very similar to the final model .
Its side - on profile was more like that of the British Medium Mark D , including the snake track - system , with the drive wheel higher than the idler in front .
Seen from the front it was very similar to the final model , but its side - on profile was more like that of the British Medium Mark D , including the snake track - system , with the drive wheel higher than the idler in front .