I bought these 4 mags as a package deal at a local gunshow. Pouch is USGI, and looks to be dated either 1951 or 57. Two mags are parkerized and SEY marked (Seymour Products I assume). The other two mags are also parkerized, and are marked 'W.R.A' on the bottom spine, and 'USMC' on the floorplates. I have never seen these markings on any 30rd mag before, whether commercial or GI.
Does the 'W.R.A' stand for Winchester Repeating Arms? And was it common to stamp USMC on mags used by the Marines? Or are these just elaborate fakes?