Swiss Locomotive and Machine Works

Swiss Locomotive and Machine Works (German Schweizerische Lokomotiv- und Maschinenfabrik; French Société Suisse pour la Construction de Locomotives et de Machines; or for both, SLM) was a railway equipment manufacturer based in Winterthur in Switzerland. Much of the world's mountain railway equipment was constructed by the company.


The company was founded in 1871 by the British engineer Charles Brown.[1] SLM built both steam and electric locomotives, including the crocodile type.

From 1992, SLM returned to producing steam locomotives designed around advanced steam technology principles. This included rebuilding DR Class 52.80 locomotive number 52 8055.[2]

In 1998 the cog-railway division was sold to Stadler Rail, and the engineering division, via Adtranz, to Bombardier Transportation. The remaining business was renamed Sulzer-Winpro AG and as part of a management buyout in 2001, was renamed Winpro AG.

The advanced steam division was sold in 2000 to Dampflokomotiv- und Maschinenfabrik AG (Steam Locomotive and Machine Works Ltd), or DLM AG.[3]

In October 2001 the measurement division was sold to PROSE AG.

Winpro AG was sold on 7 September 2005 to Stadler Rail.

Preserved SLM Locomotives


ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
Sk11885124Mixed traffic steam locomotive4052-6-0Finnish Railway Museum
F11886132Passenger steam locomotive4340-4-4TFinnish Railway Museum“Felix”


ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
19236Mountain railway rack steam locomotive2-4-2TChamonixLast of 6 built for Chemin de fer du Montenvers


ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
khekda (crab)
19284502, Sir Leslie Wilson1,500 V DC, 650 hp
Electric goods locomotive
C-CNational Rail Museum,
New Delhi
10 built by SLM
31 similar built by Vulcan Foundry [4]


ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
19025Narrow gauge steam locomotive14400-6-0TWaldenburg railwayBuilt for the Waldenburg railway; gauge 750 mm (2 ft 5 12 in); named Gedeon Thommen[5]
19126Narrow gauge steam locomotive22760-6-0TSwiss Museum of TransportBuilt for the Waldenburg railway; gauge 750 mm (2 ft 5 12 in); named Waldenburg[5]

United Kingdom

ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
18952Mountain railway rack steam locomotive9240-4-2TSnowdon Mountain Railway“Enid”
18953Mountain railway rack steam locomotive9250-4-2TSnowdon Mountain Railway“Wyddfa”
18964Mountain railway rack steam locomotive9880-4-2TSnowdon Mountain Railway“Snowdon”
18965Mountain railway rack steam locomotive9890-4-2TSnowdon Mountain Railway“Moel Siabod”
19226Mountain railway rack steam locomotive28380-4-2TSnowdon Mountain Railway“Padarn”
19237Mountain railway rack steam locomotive28690-4-2TSnowdon Mountain Railway“Ralph”
19238Mountain railway rack steam locomotive28700-4-2TSnowdon Mountain Railway“Eryri”


ImageClassBuiltNumberTypeSLM NumberWheel arrangementLocationNotes
HGm4/6(BB 204)1981-1984Diesel ElectricBo-2-BoPT KAI DIVRE II West Sumatera

Only at Padang and Solok

SSS100/E101921-1928Steam Rack Locomotive0-10-0RTPT KAIPreviously had Staatsspoorwegen ter Sumatra's Westkust with name SSS100
ESS 30001924Electric Locomotive2-8-2PT KAIIn Batavia (now Jakarta) but this locomotive has been reduced 1970.

See also


  3. Dickinson, Rob. "Sulzer Winpro sells Steam Business to Hug Engineering". International Working Steam Locomotives. Retrieved 2008-03-06.
  4. Hollingsworth, Brian; Cook, Arthur (2000). "Class WCG1". Modern Locomotives. pp. 50–51. ISBN 0-86288-351-2.
  5. "Switzerland's Waldenburgerbahn, 2010". Retrieved 2015-01-26.
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