Navy holster(s) ???

[mystical_tutor]

Any information you would be kind enough to share with me about these two holsters will be appreciated.

1) a P-38 holster elongated to accept a Navy pistol. Is this a post-war hack up of some kind or modified for military use in some way?
The acceptance stamp looks like an Eagle with no letter and the office WaA7(0or8or9) ? (too far under the strap to identify).
I have no idea what offices might have accepeted P-38s and could not find the exact proof in Costanzo or Still. (which may well have been my problem).