Hi Pritch,
I'm with lbgradwell. I think that Craftsman tool manufacturers used the tools that were in their inventory to make sets. It probably didn't matter that various sets of wrenches, sockets, etc., included individual tools with different production codes on them. Like I said before, I'm definitely not a Craftsman expert, but I do think that when it comes to tools marked with a "v" code, those with the =V= came before those with a -V-, and those with a -V- came before those with a -VV-. In the case of your wrench set, it's entirely possible that later produced wrenches marked with the -V- were mixed with earlier produced wrenches marked a -VV-. Other later "v" codes included an upside down v in front of a standard looking v (^v) and a standard v in front of an upside down v (v^). It gets confusing! I try to collect those tools with the =V= and -V- marks.
Jim C.