This vintage dead reckoning computer model AN 5835-1 by J.B. Carrol Company is a collectible item that aviation enthusiasts will surely love. Manufactured in the United States, this item holds historical value and is a great addition to any collection of military aircraft items. Perfect for display and for those who appreciate the art and science of aviation, this dead reckoning computer model AN 5835-1 is a rare find. It is a wonderful piece of history that captures the ingenuity of aviation technology during its early days.