M-548 Ammo Box
For 100, 20mm cartridges clamp on each end no hinge 18.5 x 14.5 x 8.2” NSN is 8140-00-739-0233 Drawing Number 7158943
20mm
Mark 1 20mm Ammo Box
developed during WWII rubber gasket and six clamps for the lid 18-1/2 x 9-1/2 x 14-5/8 gray color indicates Navy issue M548 20mm box eventually replaced the Mark 1