Hey Rob, the N331 Art Series cards are interesting. Some of the art work is well known, other pieces seem to be lost to time. These cards were being distributed at a time when many in the general public felt showing an ankle was over the line. Some of the Art Series cards can also be found with the more generic and common SF Hess advert at bottom such as the following Lady Godiva (less scandalous than many of the others).
Phil & Mike, the N321s are sweet. They are the most common SF Hess baseball issue but still represent a challenge to collect in quantity. I'm aware of two complete sets and a third collector one card short. The checklist is considered complete at 40, not sure why SF Hess was advertising 83 (this number is reported in multiple papers over period of couple months). Mark Macrae has previously shared details on paper variations but I don't believe SF Hess would count double based on these minor variations (plus doesn't get you to 83). Maybe they accidently shared a number that accounted for both the color cards (N321) and photographic cards (N338-1) although only about half of those additional 43 cards have been checklisted as N338-1 (very rare card issue, could be 43 subjects with many lost to time). Maybe SF Hess simply made an advertising error or they wanted everyone to smoke endlessly to reach 83
Welcome sharing other theories or just copies of your favorite SF Hess cards.