The National Chicle Sky Birds set, produced in 1933-34, continued the tradition of high quality gum cards in the world of non sports.  Goudey had just produced their high quality Indian Gum cards, and National Chicle responded in kind with their full color Sky Birds set, depicting all the great aviators and planes of the day. This beautiful set is complete at 108 cards and includes the difficult-to find high #’s 97-108. In this collection there are (86) of the rarer "one of a series of 144 cards."  Overall, the cards grade at 65% VG-EX, 20% EX or better, 15% lesser, with specials as follows: #1 (VG-EX, crease), #20 Rickenbacker (VG-, crease), #23 Von Richthofen (VG-EX, crease), #32 Doolittle (VG-, creases), #36 Lindbergh (VG, creases), #48 Earhart (GD-VG), #49 Wright (EX+), #62 Post (VG-EX), #72 Spirit of St. Louis (EX-MT) and #108 (last card, GD, crease). In addition, there are 20 duplicates, including Lindbergh, Post and Doolittle.