U.S. Service Issue Pocket Signal Disk for Semaphore and Morse Code Practice game set diplomat and traveller Sir Robert

diplomat and traveller Sir Robert Ker Porter (1777–1842)

which are much coveted and pretty hard to come by

used to hold them up and make them dance

and about 15 1/2" across (I measured nose to raw edge when folded: 7 3/4" on each side

Good condition

U.S. Service Issue Pocket Signal Disk for Semaphore and Morse Code Practice game set diplomat and traveller Sir RobertThere 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