Help with Butt Plat ID

[SA M1Dom]

Just finished the part 2 article in the GCA Journal on butt plates and it compelled me to take a look at one I have. I'm not sure what I have here but I thought maybe HRA? Any help would be appreciated.
Dom

Information

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[Bill Hollinger]

It looks post war to me but beyond that?????

[SA M1Dom]

It looks post war to me but beyond that?????

Yeah I agree but what has me stumped is the make I'm definitely no expert but I was thinking either SA or HRA. The round plunger is whats tripping me up.

[Bob Seijas]

Looks like HRA to me, too. The very flat apron around the lower screw looks like the one in the Journal picture.

[SA M1Dom]

Looks like HRA to me, too. The very flat apron around the lower screw looks like the one in the Journal picture.

That's the picture that caught my eye, that made me think it was HRA as well. That and ( not very clear in the pictures) it has a round plunger.

[Orlando]

Looks to be Springfield to me.
If you look at the bulges by the hinge they blend smoothly , a HRA the end of the bulges are sharper