I would like to know more about this gun if you guys know about it. Here are some pics of my new hog leg. It looks like a 1905 4th change but I don't know for sure and the year of manufacture list in the FAQ section does not cover the serial number. Thanks guys

Not a 1905 4th change. The caliber is 38 S&W not 38 S&W Spl. Given the missing lanyard ring, I'm guessing a K-200 (38/200) made during WWII. Someone more familiar with these will be along. Are there any other markings or do you see any initials not visible in the pics?

Welcome to the forum.

From what I know and have read:
These were built for the British Government prior to our entry into WW2. These were actually purchased by them, not lend-lease as were the later 'Victory' models. Some of the overruns were sold here and won't have British proof stamps.
Chris

Anybody know what that "P" stamped on the butt means?

Mechanically, it IS the same as a 1905-4th.
Technically, it is a 38/200 British Service Revolver.
They did not HAVE to purchase them- they already had! S&W had spent most of a $1,000,000 advance from the Brits developing the very sorry 9mm Light Rifle, and the Brits wanted their money back!
Hellstrom negotiated a deal whereby the Brits took payment in guns.
This one appears to have been diverted by the U.S. Gov't., probably for guarding a Defense plant. I believe the P is an acceptance mark by the US.

Hey guys--took a dinner break.

I opened up the cylinder and there are matching numbers on the frame and yoke-- 83139.

On the top of the barrel there is the patent info from Feb 06, Dec 14 etc.

The cylinder serial number matches the frame on butt.

Looking at the picture-- that spot just above the grip and rear screw there is a mark. It looks like it was to be a circle (about 80% of the circle remains) and inside it it looks like a very narrow W. I thought it was a V, but it has the additional line that makes it a W. It is oriented by turning the butt of the gun down and barrel up to read the W. I took the grip off and there is an H and a R stamped far from one another on the right side of the frame at the bottom.

Your description of the W in a circle sounds suspiciously like the King's Broad Arrow in a C, which would indicate a weapon used by Canadian forces. That might explain how it got back to the USA without all the proof stamps &c. usually found on British pieces.

Picture a capital C with three lines in it, one vertical, the other two sloped, all intersecting at the top of the letter.

A good picture of the stamp would help.