I was lucky and persistent and got three guns at decent prices I've looked for a long time.

Nice is the Springfield one of the USMC marked snipers ?

I would almost be willing to bet you have a New Holland hit and Miss or two hidden up there somewhere ! Another of the things I wish I’d kept instead of selling to buy something else 😂

I picked up four Parkers for my collection this year;
A 1925 DHE 12ga special order gun, built on a #1 frame with two sets of barrels 26" IC&IC and 28" F&F, the gun also has an articulated trigger, weighs 6#7oz. A 1904 DHE 16 with 26" Damascus barrels and a 1925 GHE 20 28" IC&F and a 1903 GH 12 on a #1 frame with 28" M&F Damascus barrels.

My only purchase this year was a Parker Reproduction 28/410 two guage set.
Double trigger, pistol grip, splinter and beaver tail forends.
Both barrels measure 26" with the 28ga having IC/Mod chokes and the
410 Q1 & Q2. Both barrels marked Parker Reproduction Proved on the barrel flats.
The 410 barrels have the Parker legend on the rib, the 28ga has no marking on the rib.
All in the original case with cover.
Does anyone know what the F on the 28ga barrel lug means?

This is not a USMC gun, these were made as is by the armory as sporters with a special buttplate, barrel band and halfstock. Springfield Armory sold them commercially for hunting and target shooting in the thirties. Mine is drilled for the target blocks and has a Lyman Targetspot scope.

Back in 2011 Richard Skeuse answered the F question with this: "The first batch of 28 ga guns that we ordered had that F on the lug. They came that way from Japan. I think the manufacturer misread an accounting code we used for computer codes."

Nope but I just acquired a 2 hp IHC Famous vertical.

Let’s see, had my underlifter two barrel 410/28 gun worked on to be tournament ready. Lou Rotelli put a new stock on it and did some tweaking to the internals. Picked up a 32” VHE 12g live bird gun. Fits like a glove!! Also picked up a 28” 16g VH. Did some clean up and trigger work to it and it is now my 16HL event Gun. Picked up a GH 28” 12g with fishtail top-lever early in the year too. Picked up some Lefevers too, but that’s it for the Parker guns.

Mike, have you shown pictures of this gun here on the forums? I'd love to see that!