The right side of the revolver, pictured above, bears scars for which I was verbally thrashed. As a young man, I needed to keep a gun in my vehicle, as proven by an event on the streets of Tampa, when a carload of armed hooligans drew down on my sadly-unarmed self. Thankfully, they decided not to open fire, and to guard against possible future encounters of this type, Dad allowed me to keep this gun in my truck.
I didn't pay it the attention I should have, and some rust resulted from my neglect. The Parkerizing on this gun doesn't stand up well to corrosion, as you can see - especially on the top right of the frame, near the barrel. The lower front end of the barrel also shows damage. This proves two things: 1) I screwed up; and 2) Parkerizing ain't always the tough finish it's cracked up to be.
Also found on the right side of this gun are a D stamped at the bottom right of the frame, and an S stamped at the top left, just forward of the hammer.
As you can see, the grips are plain wood. Sources and my eyeballs agree that they are made of walnut.
This gun has a positive hammer block feature built in, which allows it to be safely carried with six rounds in the cylinder. It has been said that this is not true of the Smith & Wesson M1917, but I haven't personally seen proof of that as yet.