TKP
(Maus Ma) - "Mouse" straight key used for Krigsmarine (German Navy)
signalers training. On top of TKP straight key there is blinker installed
which provides for
changing color in the four openings
from black to white following hand manipulation. We suggest that such key
assemblies were employed in Krigsmarine schools to raise up skills in visual
Morse code reception used by sailors. "Maus Ma" is our informal
abbreviation.
