See pictures for condition - RARE FIND!!! Set of 4 Limited Edition Historic Collectors Cards THE AIR POWER SERIES Revell, Inc and Science Program - #1 Northrop F-89D Scorpion, #2 Boeing B-52 Bomber with the North American X-15, #3 Convair F-106A Delta Dart, #4 Boeing B-29 Bomber. Cards are in great shape.