Ryukyu stamps, unused

This item was purchased by my father around 1972, the year Okinawa was returned to Japan.
It is unopened, but there is age-related deterioration such as wrinkles in the film and discoloration of the backing paper.

Please consider this item with an understanding of long-term home storage.

Size: Approx. 17.5 x 10 cm
Stamps: 6 stamps, unused