An advertisement in The Jackson Tennessee Sun newspaper from 11th February 1968. Before I found this I wasn’t even aware that Schick had manufactured double edged razors.

I mean, I shouldn’t be too surprised – after all it’s all about market shares, and no sane company would give up the opportunity to compete head to head once patent rights on the double edge blade and razors had expired. And Schick do own – as far as I know – Wilkinson Sword, which do manufacture both blades and double edged safety razors still.