Well, I WUZ gonna tell you that WRA stood for "Equal Rights Admendment", but you might not like that! *snicker*
The P14 was designed by the British, and it was decided to build it in the US since British arms making was already stretched to its limits early in WWI.
Eddystone Remington Arms (ERA) was a facility located in Eddystone, Pennsyania, I believe, and was subsequently taken over under US Government control to make M1917 rifles for the US military.
Please be advised there are many reports of overly-tightened barrels in the actions may have resulted in small receiver cracks. The major force required to remove these barrels from the actions is blamed. If your action looks okay, you are lucky.
Also, many of these actions came from de-activated rifles marked "DP" (Drill Practise) and had holes drilled through the chambers and a steel plug welded in place. Look for heat discolouration.
Neither of these should discourage you from using the action, but be forewarned if you intend to rebarrel to some hot or magnum caliber.