C.W. (continuous wave) transmitter/receiver, Mk.1, also known as Trench set C.W.Mk.1
possibly made by H W Sullivan, England, 1917.
wow
C.W. (continuous wave) transmitter/receiver, Mk.1, also known as Trench set C.W.Mk.1
possibly made by H W Sullivan, England, 1917.
wow