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Ertel-Werk für Feinmechanik · (bac)
Ertel-Werk, previously known under different names, was a
developer and manufacturer of high-precision mechanical instruments,
founded in 1802 in München by Georg von Reichenbach.
The company was taken over in 1834 by Traugott Leberecht Ertel –
he had been with the company since 1804 –
after which it was renamed T. Ertel & Sohn.
The company was taken over in 1890 by August Dietz and in 1928 by
Walter Preyß. In 1935 it was renamed Ertel-Werk für Feinmechanik.
At the outbreak of World War II (WWII)
– in 1939 – the company started producing goods for the German war effort.
In 1941 they were assigned the manufacturer code (bac).
During the war, Ertel was
one of the manufactuers
of Enigma cipher machines,
which were produced for the German Army (Wehrmacht) under licence
of Heimsoeth und Rinke in Berlin.
Enigma machines made by Ertel had their own serial number range
– with the letter 'E' added as a suffix –
and were typically housed in a Panzerholz case or in a
wooden case with a canvas carrying strap at the side.
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Ertel products on this website
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The image on the right shows an Enigma-I cipher machine
in Panzerholz case, with serial number A01262/bac/44E.
The plugboard is covered by a metal sliding planel,
whilst the spare parts are stowed behind a hinged lid
inside the dust cover.
This type of enclosure is often attributed to the German Air Force
(Luftwaffe), but this is not necessarily correct. They were also
used by the German Army (Heer).
➤ More about the Enigma I
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Apart from Panzerholz storage cases, Ertel also made wooden
cases with a hinged flap at the front, similar to the regular
Enigma cases. They were used for Enigma machines made by Ertel, but
were also supplied as replacement cases for the Enigma machines from
other manufacturers.
Wooden cases made by Ertel have a canvas carrying strap at the right side,
rather than a leather or metal handle at the rear. Furthermore,
the manufacturer code (bac) is usually
present inside the top lid.
➤ More about the Enigma I
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1802 Mathematische Werkstatt (mathematical workshop) 1804 Mathematisch mechanisches Institut (mathematical mechanical institute) 1834 T. Ertel & Sohn 1921 Ertel-Werke A.G. für Feinmechanik 1935 Ertel-Werk für Feinmechanik
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1802 Founded in München by Georg von Reichenbach as Mathematische Werkstatt
Partners: Joseph Liebherr, Joseph van Utzschneider
Products: geodetic instruments 1804 Renamed: Mathematisch mechanisches Institut
Employees: Joseph von Fraunhofer, Traugott Leberecht Ertel 1821 Taken over by Traugott Leberecht Ertel
Products: high-end measuring equipment 1834 Renamed: T. Ertel & Sohn 1890 Taken over by August Diez 1912 New partner: Adolf Hahn
Products: military instruments 1916 Taken over by Samuel Weikersheimer 1921 Renamed: Ertel-Werke A.G. für Feinmechanik
Products: cinema equipment 1928 Taken over by Walter Preyß 1935 Renamed: Ertel-Werk für Feinmechanik 1939 Production of war goods 1941 Production of Enigma cipher machines 1957 Carl Robert Preyß director
Moved to Puchheim (near München)
Products: construction surveying instruments 1984 Closed down
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© Crypto Museum. Created: Monday 16 May 2022. Last changed: Sunday, 05 June 2022 - 15:23 CET.
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