IBM The Illinois by Wayland ICA No. 23 Insuline Corp.
IBM
The
Illinois by Wayland ICA No.
23 Insuline Corp.
JACO, J.H. Ambrose & Co. KAY headphones, must be quite rare,
this is the only pair I have seen
Kellogg model 64B Kennedy
1500 ohms (per side, 3000 ohms total) Kollmorgen OPT
Nice
real leather headband on the Kennedy set
Keefe-Gartner Corp. Phila.
PA.
Keystone,
by American Electric 2200 ohms DC resistance
Krauss Buckeye 3000 ohm headphones, very uncommon, in fact, downright
rare, I dare say having only seen this one pair. Nice deep embossing on
the back of the housings, and this pair is in working condition and the
sound is quite good even on crystal radio.
Heslar 2000 ohm headphones, another very uncommon set, also never seen
another one apart from this set.
Some Notes on the above headsets:
Holtzer Cabot: Holtzer Cabot made several different headphones from
the 1920's such as the big can Universals which were good quality with
pretty good sensitivity, and the small can 2000 ohm sets pictured that
had excellent sensitivity. They also made a military set that was
equivalent
to WE 590's.
Holleyfone: Don't know much but I have one set with aluminum cans and
this set with nickel plated brass housings, 2000 ohms.
ICA: Insuline made various test equipment and the headphones were cheap
consumer grade, look like they might have been made by Cannon.
JACO: Ambrose took over from Cannon, Cannon and Miller, and if you
go back even further, Cannon took over brandes headphones. JACO was
still
making headphones last I checked around 2001, in New York State. This
pair
of JACO's had the earcap crimped on so you can't get inside to fix
them.
IBM: I don't know anything about these headphones, look like Trimm
design but this is the only pair I have ever seen of IBM magnetic type
headphones.
Kellogg: The Kellogg Telephone Company also made radio parts such as
these 64-B 2000 ohm headphones. They had a unique headband and were
very
good quiality, with good sensitivity.
Kollmorgen: These must be very rare as this is the only pair I have
ever seen. and they are not on the OTB Master Headphones List. 2200
ohms
Kennedy: The Colin B. Kennedy Company made high quality radios in the
1920's and their headsets are also well made. I have only seen a few
pairs
as they are quite uncommon and I have seen them go for well over $200
at
auctions. The ones I have seen had real leather covered headbands and
cloth
cord. The construction and parts are interchangeable with early
bakelite
Trimms and I wonder if Trimm made these for Kennedy.
Keefe-Gartner: This is a very high quality headset with
douible metal headband, celluloid insulator plate on the cans, nice
bakelity
earcaps, and 4 magnet bars per side. They are 3000 ohms DC resistance
and
sound great with crystal radio. This is the only pair I have ever seen,
makes them seem rare to me.
Keystone, by American Electric: Another pretty uncommon het of
headphones,
again the only one I have ever seen so must be pretty rare, look
similar
to the Western Electric 509-W headphones from the outside, but have a
single
coil in each housing rather than 2 coils.
Email to
scott@oldheadphones.com
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