This loudspeaker was "rescued"
from an environmental depot in a small town in the south of The
Netherlands, close to the Belgian and German border. The small
speaker is housed in a pressed paper box with a size of 20.7 x 20.7
x 12.3 cm (width x height x depth). By changing the positions of an
array of metal contact strips, the impedance of the speaker can be
set to 700, 3500, 7000 or 12000 ohm.
The loudspeaker is developed as a second speaker for
civil radios as well as for German army radio equipment and bears
the model designation WLSpkl (which probably is the abbreviation of
"Wehrmacht Lautsprecher klein" = small army speaker). The speaker
itself is a magnetic type speaker (very similar to the speaker in
the German DKE 38 radios and called "Freischwinger").
Unfortunately, in my case two windings of the
speaker coil are interrupted and only the low value impedances can
be realised. The tears and holes (visible in the right picture) were
repaired with a little bit of glue. In view of the
construction material used for the box, it is not strange to read at
an inlay paper that the user is advised not to expose the box to
rain and snow.