Luftwaffe armour-piercing bombs - when did/didn't they have any?
 

Did the Luftwaffe have any armour-piercing bombs prior to 1941? I know they had about twenty different types of them but I don't know when they were introduced. I think its a stupid question but one American historian says they didn't have any at all in 1940 and I can't find a reference to disprove him.