You are bidding for 3 Castrol GTX oil service classic car stickers.These are genuine 1960s/70s printed items by Castrol England and are genuine old items NOT reproductions 
Size approx 3" by 1 1/2" .
Originally affixed to your car either in the engine bay or on a door shut etc.
Shows next oil change and tyre pressure along with the lovely period Castrol sign. 
Note you are bidding for 3 which come on original backing paper - however bear in mind the adhesive is around 45 to 50 years old and may require further adhesive/glue if used on your car.

 Also although marked as new these have a rather period patina to them with a very slight age mottling to the white but still have bright colours as can be seen.