1918 .45 auto What do I have here

[Doco overboard]

I have this .45 auto #310139, it has been buried for about 35 years in a relatives house and I shot it when I was a kid with my dad.It had been around about 20 yrs or so before that easy. It is now mine and I'm wondering what to do with it or if it has any value. I looked at other resources on this site to determine its monetary value and have become more confused the more I look. It has some marks on the frame a eagle head with a s/4 and a G with small H and seriff D and a P on the barrel link protrusion with a HS on the other side Which I think may mean High Standard. Rifling is brite with defined lands and grooves .The finish has only about 25% left contrary to the photos. The slide has a H at the rear a Q with tiny G next to it a 4 and nearby a 7 behind the breech. It has 1918 mills pistol belt with an unmarked? brown flap holster a couple two tone magazines ,two full boxes of ball and a leather shoulder holster. There is also the 1918 two mag pouch with more mags in it. Thanks for looking and any input that is available
Attachment 71704

Information

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[Doco overboard]

Found some more out, the barrel at some point has been replaced with a later made US@S High Standard example. I cant explain how it got the barrel and not rebuilt. Everything else is as it should be it seems. The flap holster is a 1918 Hoyt Shoe Co. model and those two tone mags are chemically hardened. The web gear is not an uncommon thing. After a safety check and clean, I wrung it out and was surprised for a pretty decent group at 15 paces from a supported position. It had good positive extraction, fairly mild recoil and no malfunctions. I had always heard that accuracy was not the most outstanding feature of this design but somewhere there should be one more hole in the picture. It seems as if finish always had something to be desired but Im glad no-one tampered with it. Thanks for looking.
Attachment 71724

[skip_c]

Beautiful group. I think you key holed one.
Skip

[CINDERS]

That missing shot is in the hole just left of center, look at all the other shots they have a feathered edge all the way around the one left of center does not and is slightly oblong an indication a second round hit.
Usually when another round goes through it will take off the feathered edge so all of you who have pondered where a shot went have a look at the target a bit more closely, I learnt about the feathered edge when small bore shooting and spotting for a chap watching his sighters 1st shot dead center 2nd no change in the hole?
He completed the card with a perfect 100.10 then showed me the difference between the sighter hole and the others there was no feathered edge in the sighting hole the second bullet has gone exactly through the hole and removed the feathered edge so there is some info for you all when pondering where did that go?????

[Seaspriter]

bullet has gone exactly through the hole and removed the feathered edge

Sounds like a "Robin Hood" shot splitting the feathered arrow of his opponent.

[A square 10]

nice black army pistol , looks like original gear but its been years ago i was into this stuff , i have a similar set that is also 1918 original , congrats a very nice find

[browningautorifle]

Nice pistols all round...