I did read that thread. What I gleaned from that was that Wilton, at that time, made vises for the US government only, thus, no stamp. I also learned that the government helped out Wilton by dumping all of their vise to the public once the war was over almost causing Wilton to go out of business. I also believe that I read that there was a stretch from the early to mid-fifties with no date stamp whatsoever, if I read correctly.
What I did not read was how a vise that looks exactly like a vise from that early war period has a date stamp of 1966. Perhaps, since you like to point things out, you could point out that section of the thread to me.
