Agreeing with Ponocojack above but as expanding... These "W" caps for me are symbolic of the "formative period" of early post '64 Model 70 iterations. Such, redefining the tolerance of its loyal fans to a less than mediocre product. I view 1968 Model line as the first year of restoring the brand to something of it's old glory such as intro of the novel "bolt guide" design as materially improving the push feed action (later also incorporated in the renewed CRF models) and better job of stocks design.
Just my take!
Best!
John