Manufacturer: MTM\Case-Gard E50-38-29
MTM Case-Gard has two styles of ammo handgun slip boxes, the E-50 and J-50 series. They both hold 50 rounds. The E-50 series has a non-textured surface and has square holes. The J-50 series has round holes.
.38 Spec., .357 MAG, .38 Auto Colt