Shown in the photo is two different natural aluminum finishes for Club aluminum cookware circa 1960-70's. Both saucepans have the ringed bottoms and clover leaf knobs. The version on left has a smoother tighter pattern - the one on the right a more dimpled pattern similar to earlier Hammercraft cookware by this company.
This is something to keep in mind, if you are trying to match your existing cookware.
