The civilian aircraft industry did not come to a halt during WWII (for context, per Janes' All The World's Aircraft, 1945, which includes a 34-page section on the civilian aircraft industry during WWII, there were 2,866,824 civilian airline passengers in 1943, and 3,914,904 in 1944). PWA was definitely making radial engines for the civilian aircraft industry and perhaps they kept their civilian and military lines separate. Also, keep in mind that most if not all of the Plomb, Bonney and other OEM tools we find with PWA markings were bought by the USAAF and issued to USAAF on-board and ground crew tool-sets. The tools that PWA was using in their factory and buying from Plomb directly may have been marked WAR FINISH.
EDIT: BTW - Cool socket, Rubicon, and the first I have ever seen. (Sometimes I jump straight to the books and forget to enjoy the tool itself first. My apologies.)