![Castrol Aviator and Official Helicopter Blue Book 25th Anniversary Pin backs](https://swedemom-production.s3.amazonaws.com/spree/images/275941/large_webp/NSM11053a.webp?1653025724)
![Castrol Aviator and Official Helicopter Blue Book 25th Anniversary Pin backs](https://swedemom-production.s3.amazonaws.com/spree/images/275942/large_webp/NSM11053b.webp?1653025725)
![Castrol Aviator and Official Helicopter Blue Book 25th Anniversary Pin backs](https://swedemom-production.s3.amazonaws.com/spree/images/275943/large_webp/NSM11053c.webp?1653025726)
![Castrol Aviator and Official Helicopter Blue Book 25th Anniversary Pin backs](https://swedemom-production.s3.amazonaws.com/spree/images/275944/large_webp/NSM11053d.webp?1653025726)
![Castrol Aviator and Official Helicopter Blue Book 25th Anniversary Pin backs](https://swedemom-production.s3.amazonaws.com/spree/images/275945/large_webp/NSM11053e.webp?1653025727)
This is a lot of enamel and brass pin-backs.
Included are:
~Castrol Aviator in white with black and red print. They measure about 7/8" wide.
~Official Helicopter Blue Book 25th Anniversary dated 1978. This 1" diameter pin by Promos Express is cobalt blue and silver.
These pins are in very good pre-owned condition.