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		| Originally posted by kevinT I am looking for diagrams / pictures or reference material of the breech end of the petard mortar used on Mk IV Churchill tanks.
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 Hi Kevin;
The Petard Mortar, or by it's proper name: Mortar, Recoiling, Spigot:
(Kevin, the Petard didn't have a breech, it was loaded by the muzzle) 
Cheers 
