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The
26003A flameproof straight keys have been manufactured by several US companies.
On top of CJB-26003A, we also have CMI-26003A flameproof key that was made by
Molded Insulation, and in the UA3AO telegraph key collection which is part of
this site, CTE-26003A made by Telephonics Corporation could be found.
The
J.H. Bunnell design was also used by Germans who manufactured Luftwaffe
flameproof keys.
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