4 Maps: 1957 Antarctica, 1967 India Ocean Floor, 1968 Atlantic Ocean Floor (double sided map), 1972 Mid East Cultural (double sided map)
These maps are all Vintage National Geographic foldouts.
Dimensions when fully opened (approximate):
Antarctica: 36 inches by 29 inches
India Ocean: 25 inches by 19 inches
Atlantic Ocean: 25 inches by 19 inches
Mid East Cultural: 36 inches by 32 inches