This is the only four chip set of these chips that I know of. The American Presidents Line went out of the passenger business in the early 1970's. These chips could have been used in an episode of "Oh Susanna" a 1950's TV show featuring Gail Storm and was the model show for "The Love Boat" later seen on TV. It took place on board one of the APL ships The chips will be delivered in the frame shown for safe keeping.
Casinos did not start appearing on cruise ships until the 1970's although some ships had slots machine starting in the 1960's. I contacted APL and their oldest employee (41 years) had no knowledge of these chips.So I think they are probably from the 1950's. They are plastic with a silver inlaid APL symbol bird. The item "Vintage 1950 1970 and Very Rare Set of American Presidents Line Poker Chips" is in sale since Wednesday, May 04, 2016. This item is in the category "Collectibles\Casino\Chips\Poker Chips". The seller is "jhlmkl" and is located in Scottsdale, Arizona. This item can be shipped to United States.