These ones are
circa 1919
and have the double metalheadband with the name Brandes Superior
on the
top of the headband. The earpieces pictured may not have been the
originals.
Brandes NHI came
in
a style
that had a plastic or bakelite cover over the wire terminals and
this
style
with no cover. I believe that these are prior to 1920.
There are the
very
uncommon
Brandes Transtlantic from about 1921 or so. They measure 5000 ohms
and
are very sensitive. They were a very expensive set and I found an
ad in
a 1921 Radio News magazine for them, so that dates them to that
year.
These are the
ones
from
about 1923 with the nice cloth covered headband and the word
Superior
in
an italic script font.
Brandes Navy
Type
were
the top of the line Brandes headphones with a nice 3 conductor
heavy
duty
cloth covered cord with grounded shielding. They were 3000 ohms,
and
had
the same headband as the Brandes Superior. This pair was circa
1925,
other
varieties date back to 1920.
Next were the
ones
with
all the print enclosed in a box as pictured. This basic design was
used
on the back of the phones from about 1924 through the 30's. These
had
the
nice cloth covered headband.
After the
merger
with
the Cannon company they made the headbands cheaper with simple
metal
bands,
no cloth padding. The earcaps were made of plastic with the
multiple
small
listening holes instead of the one central hole.The magnets were
also
changed
from the flat curved shape to a tubular curved shape. Saving money
I
guess.
The Brandes
Admiral
were
4000 ohm headphones that were similar to the later Superiors,
cheaper
made
phones with simple metal headband, produced after the Cannon
merger.
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