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The signal whistle (signalpfeiffer) was a very simple design; made of black
bakelite, it was about 5cm long with a single chamber pipe containing a wooden
ball. A round end cap had a ring moulded onto it to accept the whistle cord
(signalpfeifferschnur). The cord was approximately 35cm long, braided in a
chain herringbone pattern with a 2cm loop at each end. One loop was threaded
through the ring on the whistle, with the lanyard passing through the loop also
and knotted in place. The other loop was secured to a button on the
uniform.
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