Green’s Dictionary of Slang

get n.4

[i.e. what the robbers get; 14C–17C SE]

(US) the profit, the take, the booty of a robbery.

[US]Berrey & Van den Bark Amer. Thes. of Sl. 470.1: Booty [...] get, goods, grab [DARE].
[US]Wentworth & Flexner DAS 212: Get [...] Profit; the ‘gate’ [DARE].