"Single Cell" or "Three Quarter" Wall Phones
These models were more compact than the standard wall phone, typically 170mm
to 215mm wide. They had a smaller generator with two or three magnets. They
were suitable for intercoms and point-to-point lines rather than general telephone
service. Most of the fittings were the same as those on the full size cases.
The only exception seems to be the lack of a cradle handset model in the range.
Although often classified by collectors as Single Cell, they are listed in Ericsson
catalogues as "constructed to hold two cells RK240". The Ericsson
cell was somewhat smaller but taller than the more widely available LeClanche
cells. Examination of the Ericsson catalogues shows that many single-cell phones
are actually the miniature models
with an optional battery box added underneath.
Because they are uncommon, and tend to be more ornately finished, the single
cell phones are prized by collectors. The earliest ones, particularly, were
highly decorated. Some were produced with a switch above the writing slope to
allow them to be used as intermediate phones in intercom systems. These are
designated as ADxxx models.
To Single Cell Phones
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