Churchill Black Prince, last of the Infantry Tanks, armed with a QF 17 Pounder but rendered obsolete by the Centurion which was nearing completion : r/TankPorn
If the British could put a 17-pounder in a Sherman, why couldn't they do that in a Churchill? - Quora
If the British could put a 17-pounder in a Sherman, why couldn't they do that in a Churchill? - Quora
Black Prince - The Ultimate Churchill Tank
The Tank Museum - Black Prince was a prototype for a heavier Churchill tank that never entered production. The Museum holds the only complete survivor.
Tank Archives: First Among Equals
Tank Archives: Black Prince
Black Prince (tank) - Wikipedia
Tank Archives: Black Prince
Black Prince - The Ultimate Churchill Tank