Doug Nelson , Jun 30, 2007; 12:21 p.m.
Mine came standard on a Canon FT-QL bought in 1968 through the US military exchange system. It was probably a marketing point, offering a 1.2. as standard. I loved the lens, and stupidly sold it. I have yet to determine whether my 55mm FD f1.2 (chrome nose, non-Aspherical) is as good. It is quite sharp down to about f4 and has a sweet softness to it at wider apertures. (link) was shot fairly wide open, maybe not at f1.2. The ship shot in my Virginia gallery was shot with this lens.
For more info, google the Canon Museum.