Semaphore Trainer, US Navy H-21 and can be seen behind

and can be seen behind the cockpit of many allied fighters and mid spine on multi engine aircraft

with a control panel

such as the fighter P-38 medium bombers B-25 and B-26

The gyro does spin when manually rotated

We have more than one in stock

Semaphore Trainer, US Navy H-21 and can be seen behindHere is a very interesting device, a Semaphore, or Flag Signaling, Trainer, made for the US Navy Special Devices Center by the advertising promotional firm Einson Freeman, Inc. The device is a rotating training card within a card. The "Sender" view is on one side and the "Receiver" view on the reverse side. When rotated to the desired letter by the Sender, he see's which flag arm position must be taken to communicate that letter. The Receiver, upon