Brass Box "Pocket" Sextant ca late 19th Century U-2 Very cool indeed

Very cool indeed

or by the ground crew pre-flight

it has two WWII aircraft etched on opposite corners

an organization under joint operation of the US Air Force and civil authorities

Observers worked within the structure of the Ground Observer Corps to ensure proper training and communication

Brass Box "Pocket" Sextant ca late 19th Century U-2 Very cool indeedThis is an original brass Box Sextant, or "Pocket" Sextant. At 3 inches in diameter and 1. 5 inches when closed, it could easily fit in the pocket of a mariner for determining position at sea or for determining horizontal positions on land. Box sextants have been around since the early 1800's. We speculate this example was made in the late 19th century. The protective outer case unscrews from the mechanism platform and screws back on to it's opposite