CG-18 is the WAC chart that covers from San Francisco clear down to Los Angeles
The FAA quit making them in 2015. I had two sets ( it takes two because they are printed on both sides) that i used to make a large wall map in my hanger. for some reason I only had one CG-18. Beware there is a CF-18 which is the great lakes area. I have two of those.
Any help is greatly appreciated.
Mike