Dennis Ellingson told me long ago that there was a particular year marked MIL-K in the 40.'s after WWII, that was extremely scarce and hard to find.
Unfortunately, I cannot recall the year, but I suspect it was 1949.
DE OPPRESSO LIBER
"...Men may spurn our appeals, reject our message, oppose our arguments, despise our persons ___but they are helpless against our prayers. "