Highly likely. The remnants of paint that color, called "Ocean Grey" in several wartime references, has been found on wartime wrenches, including Vlchek, Williams, and others. I have a Vlchek somewhere similarly marked, with the same paint remnants, but it is marked Vlchek and it's not a tappet wrench. I don't know what that "93" is. Probably some kind of model or part number. I'll dig out some references tomorrow to see if I can find it.
Edit: Here's a good comparison below. This wrench is a little older, also made by Vlchek, but not marked Vlchek. The "tell" is the Chrome Molybdenum marking on the shank. The slightly raised capital C and M are Vlchek signatures. As is the placement of the forge number. Yours has a forge number in the same place and the composition (ALLOY STEEL) on the shank. The paint on this one was confined to the shank, not the heads, and is sticking pretty good, but it's also Navy grey.