Springfield Armory barrel markings?

[M1Garandy]

I have what I believe is a Springfield Armory M1911 barrel marked with an "S" over a "P" on the left lug. Clawson's book indicates that barrels marked with an “S” over a “P” were used in the 127,000-127,978 S/N range plus post-WWI rebuilds.

However, on my barrel the letters are stamped vertically, not horizontally. Has anyone ever seen a genuine Springfield barrel marked this way?

Thanks.

[Duane Hansen]

It sounds like the barrel that you describe is of the same vintage whether stamped vertically or horizontally. It could be either way in the 127,000 to 127,978 serial number range.

[M1Garandy]

Thanks Duane. The illustration in the book showed horizontal letters so I was not sure if vertical letters were a legitimate variant.

[Johnny P]

These are all between the wars barrels or at least have the shoulder instead of a smooth transition in front of the lug, so it doesn't appear that the S P placement indicates anything.

[M1Garandy]

Thanks Johnny.

I also have a later SA barrel that has the step on the bottom at the front of the chamber.

The barrel I'm asking about does not have the step. Funny enough, I saw another just like it (much nicer than mine) for sale yesterday at a show.