Stalin's main contribution to bank-robbing lore occurred on June 13, 1907 in Tbilisi. Stalin and his confederates had gotten inside information from a clerk about a pair of mail coaches that would be delivering 250,000 rubles in cash to the local State Bank branch. The plan wasn't exactly intricate: the coaches were attacked in daylight in the middle of the city with guns and homemade explosives lobbed at the Cossack guards. More than thirty people (including numerous bystanders) were killed, and the "bloodstained" loot was hand-carried to Lenin. Stalin did not personally participate in the attack and never admitted involvement; documentation unearthed after his death proved he was one of the main planners.

Source: Caro's Stalin

Edit: just reread your question and realized it wasn't about Stalin's bank-robbing but about the banks themselves. But it's worth mentioning that Stalin never robbed the kind of bank you're talking about.