The Brits were expecting the Germans to invade and needed a anti tank weapon in a hurry. A 3in naval anti aircraft gun was mount on a Churchill and out of the 50 unit contract only 25 were produced before the contract was cancelled. Don't pay any attention to the box art because they never left the Isle therefore never saw any action.
Yesterday I wanted to see how the gun box looked all together but never could stop sticking things together until midnight. :idonno
Another one of those empty interiors not even a gun breech.
Update pictures coming as soon as I find a PE part I dropped.
Tony lee