IHC Rifle - Is Stock IHC ?

[Ramboueille]

I've never been able to decide if the butt stock on my IHC Garand is IHC or H&R.
The top recess on the butt stock has no numbers, although I believe some early IHC stocks had no numbers.
The acceptance stamp is 3/8".
The bottom trigger group locking area has a v shaped rear recess.
I've never been able to discern between an IHC and H&R profile.
The barrel is "LMR 53".
All parts are IHC except the trigger group which I changed for shooting preference (I kept the IHC group).

Is there a "P" proof mark on the pistol grip face? Your stock isn't IHC for sure.