What is the part number on the socket? Is there any chance of you posting a side view showing the markings? The '42 catalog only shows them going up to 7/16".
Thanks
-Don


Just to make sure you didn't misunderstand my previous information to you, the drive size wasn't a personal choice. The US Army Air Forces stuck with 9/32-inch drive as their standard for midget work to the bitter end, all the other branches (e.g., QMC, Ordnance, Engineers, Signal Corps, etc) went to 1/4-inch drive before WWII.Snap on produced 9/32 through the war in support of military efforts and mechanics who used 9/32.