WWII jeep oil cans were 6-1/2" high with spout, 2-1/2" high vessel (without the spout), straight 4" spout, 4" diameter base, 1/2-pint (8 ozs.) capacity, made of steel, with a bottom made of 0.12" spring steel (hence the name "spring bottom" push cans), electrically welded to the body. Same spec for the GMTK. The base diameter and height spec were important because the jeep toolkit oil can was kept in an ingenious sliding-catch holder mounted on the fire wall under the hood in the engine compartment. The straight 4" height of the spout spec was important because the GMTK oil can needed to stand straight up in the bottom of the carry box with the spout sticking through a hole in the removable tray, as I have noted many times before. See Pic 1, on the left.
I had the same CRAFTSMAN marked example as ooba tooba. Sold years ago. I considered it postwar due to the lines bracketing either end of the logo, which was reminiscent, for me, of Heritage styling. It was also slathered in an opaque lacquer on the bottom, to retard rusting, which was a September 1949 fed spec. I could be wrong. I compared it to Eagle, GEM, and Noera cans and never could figure out who made it for Sears. See Pics 2 & 3.
Sears, Roebuck, & Co had a multitude of contracts during WWII worth a total of $17.836M, from the expected (cotton sheeting, shoes, handkerchiefs, fountain pens, refrigerators, padlocks, sewing kits, etc) to perhaps the unexpected (M5 Gun Parts, Mortar Shell Bodies) and some interesting things in between (seabags, canvas buckets, electrical repair kits, and vulcanizers). By far their biggest contracts were with the Navy and, as Don alluded to, the Signal Corps. Due almost certainly to their proximity to the Navy Yard, the Naval Air Factory, and the US Army Signal Corps HQ all being located in Philadelphia. Tools and tool-sets were almost exclusively confined to Signal Corps. But they did have two small interesting contracts with the Air Corps for "Sockets" and "Shop Equipment."
I've said this before, but it bears repeating, because it doesn't seem to be well-known for whatever reason, but Sears, Roebuck and Co's single most significant contribution to the war effort was undoubtedly Donald Marr Nelson (1888–1959). He was an executive vice president with Sears for many years before being plucked by request, by name, by FDR himself to be the Director of Priorities for the OPM in 1941 and 1942 and then Chairman of the War Production Board from 1942 to 1945. That's right. The WPB. He ran the War Machine. It's not at all a stretch to say that a Sears guy was FDR's right hand supply man during WWII. And supply (along with air superiority, radar, cryptography, and D-Day deception) won the war.