As I daily scavenge the web for references I thought that I might as well post my findings here.
This first part will be dedicated to the M4A3E2 Assault Tank – postwar nickname “Jumbo”/”Cobra King” – extra armour (including 4″ on front), vertical sided turret, but about 3-4 mph slower. Built with 75 mm gun but frequently re-armed by the using units with 76-mm guns.
Users: US, France (one vehicle)
A total of only 254 tanks was built.
A great website showcasing the restoration of the famous Cobra King can be found here.
A brief operational history on the Jumbo