The "2" is undoubtedly the 1942 date of production stamp, which is uncommon enough to begin with. The only date stamp more uncommon for Snap-on wartime production is a 1943 "3". Empirically, from survivors, it looks like they started off modestly and quickly ramped up their production during the war, peaking in 1944 and 1945, and public contract records and their 50th anniversary stakeholders meeting booklet confirm that.
That all caps font style on the branding is also uncommon, in my experience, and smacks of third party or limited production to me.
Lastly, I think that "big A" you are seeing is part of a stamp that reads "PAT". That "2195297" stamp is the number for a patent granted in 1940 for a mold for pressing out hot-forged parts, such as the halves of a universal joint.
I don't recall seeing that patent number on any Snap-on socket before.
I am tagging a couple other collectors to make sure they see this.
@snapmom @Oldtuleguy