My "new" Springfield 1903, 1910 receiver and 1905 barrel...

[RCS]

My photo shows a Rock Island 64145 serial number with RIA 3-07 dated barrel and a Springfield 160963 serial number with SA 2-07 dated barrel. The Rock Island has the groove added to the handguard and a single stock bolt, the Springfield is without stock bolts.

If your 1903 went through rebuild there should be some rebuild stamps and maybe an additional P proof stampAttachment 82367

Information

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[AlabamaMilsurp4]

My photo shows a Rock Island 64145 serial number with RIA 3-07 dated barrel and a Springfield 160963 serial number with SA 2-07 dated barrel. The Rock Island has the groove added to the handguard and a single stock bolt, the Springfield is without stock bolts.

If your 1903 went through rebuild there should be some rebuild stamps and maybe an additional P proof stampAttachment 82367

These are all the proof marks and cartouches I have found so far

[AlabamaMilsurp4]

The sling looks like a WW2? Does it have steel frogs or brass frogs with the original blackening? Dated?

Its a 1918 M.D.C, H&P

[browningautorifle]

Its a 1918 M.D.C, H&P

Very nice, still has most of it's coating.

[browningautorifle]

Also the rear sight of the RIA has the platinum line?

[Rick the Librarian]

I seem to recall an EHD stamp which dates to WWI.

[AlabamaMilsurp4]

I seem to recall an EHD stamp which dates to WWI.

The first letter is definitely an R, B, or P. I posted a picture^^^ hard to see though.