1856
The first telegraph equipment is supplied by S&H.
1881
Up to 1881 a telegraph network is developed.
1907
An SSW office is founded in Istanbul, directed by Siemens Österreich (ÖSSW).
1918
The Istanbul office is now directed from Berlin.
1924
The SSW office becomes a Technical Bureau.
1925
The Technical Bureau Istanbul becomes an independent Turkish company with the name Elektro-Radio; two years later it is renamed Siemens, Société Anonyme Turque d’Electricité.
1932
The Siemens company in Istanbul is liquidated; Mühendis Tarnopol becomes the agent for S&H and Sazmas for SSW.
1953
Türkeli becomes the sole agent for S&H and SSW.
1958
Türkeli is converted into a new company, Simko, in Istanbul. In 1967 Siemens acquires the equity majority.
1963
A Turkish cable factory under the direction of Siemens is founded in Mudanya. Power cable manufacture is commenced in 1965.
1971
A plant for the manufacture of telecommunications cables is established; a Siemens foundation for private social insurance is created.
1977
The sales company Etmas becomes the agent for Siemens AG in Turkey.
1983
Etmas receives the status of an international Siemens company.
1989
Manufacture of EWSD, the digital electronic switching system, commences in Kartal.
1990
Ambarli, the largest combined-cycle power plant in the world, is built near Istanbul.
2000
Simko is taken over completely by Siemens and operates as of 2001 as Siemens Sanayi ve Ticaret A.Ş.
2004
Siemens lands a contract from Turkey’s Ministry of Finance for the country’s biggest e-government project
2007
An order is received to deliver the country’s biggest industrial gas turbine to date, which will be installed in a coal-fired power plant in the northwest Black Sea region