U.S. Service Issue Pocket Signal Disk for Semaphore and Morse Code Practice colored ink drawing this has yet to happen

this has yet to happen

The message at the bottom from the sender

It is signed (incised) on the bottom

but notable on of the other suits

one of a kind piece

U.S. Service Issue Pocket Signal Disk for Semaphore and Morse Code Practice colored ink drawing this has yet to happenThere were a few different iterations of double sided "Pocket Signal Disks" like this one I've seen one issued by the Boy Scouts, one from WWI, and this one from WWII designed for practicing two arm Semaphore and International Morse Code. Tons of information is densely packed onto both sides, with interactive dials allow one to scroll through a range of "special flags" and "alphabet flags" which correspond to flag positions and codes. I really love