Physical description
Martin 250CE Mid Upper Turret first introduced on the L Model B-24 Liberator. The US Army Air Force Model 23A became standard on all late model J, J/R, L, M and M/R model Liberators. The 23A was an all electric Turret. It was armed with two .50 calibre machine guns (Browning) MKII. The Turret carried 900 rounds (bullets), 450 rounds per gun.
