Chilly,
The 3rd wrench (bottom in your photo) with the part number 44572 would date from 1975 to 1986. The other two wrenches without the part numbers would date to 1974 or earlier. That's as close as I can get you. The presence of a part number on V-series tools is a reliable and dateable feature.
That said, I'm not sure the single line -V- vs. the double line =V= is a datable feature on wrenches. I have a set of Crafty V series wrenches (bought new as a set) that have single lines on the smaller wrenches and double lines on the larger wrenches. Cases like this make me think that the single line vs. double line is unreliable as a date indicator. Of course, new and persuasive evidence could completely change my view on this...