I bought a rather beat up M1A1 five years ago with plans to "restore" it

Just purchased a nice condition butt stock marked with small ordnance cartouche (circle with crossed cannons). Have a second stock with large ordnance cartouche. If they relate to Garand markings the smaller cartouche indicates later war manufacture. Can anyone confirm this?
Additionally, and this worries me a bit

Thanks for any responses. From the newcommer. Terry