Quote Originally Posted by himself View Post
everything you could possibly need to know
except that that the SLR 680/690 are the same type as the sx-70 but use the 600 type film not the sx-70 types, well, that info is on there, but in a different section.
Here is the SX-70 section of an alternative lay-out of that Land-List:


http://www.instantoptions.com/landlist/cameras/sx70/

I find it more clear than the original, though the types 680/690 are not registered under SX-70 (I never came across them anyway...)