# 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.

## History

The company was founded in 1871 by the British engineer Charles Brown. 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.
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.
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
### Finland

| Image | Class | Built | Number | Type | SLM Number | Wheel arrangement | Location | Notes |
| | Sk1 | 1885 | 124 | Mixed traffic steam locomotive | 405 | 2-6-0 | Finnish Railway Museum | |
| | F1 | 1886 | 132 | Passenger steam locomotive | 434 | 0-4-4T | Finnish Railway Museum | “Felix” |

### France

| Built | Number | Type | SLM Number | Wheel arrangement | Location | Notes |
| 1923 | 6 | Mountain railway rack steam locomotive | | 2-4-2T | Chamonix | Last of 6 built for Chemin de fer du Montenvers |
| 1909 | 3 Mlle d'Angeville | Mountain railway rack steam locomotive | 1990 | 0-4-0T | Saint-Gervais-les-Bains | One of five built for the Mont Blanc Tramway |
| 1909 | 4 Jules Jansen | Mountain railway rack steam locomotive | 1991 | 0-4-0T | Saint-Gervais-les-Bains | One of five built for the Mont Blanc Tramway |

### India

| Image | Class | Built | Number | Type | SLM Number | Wheel arrangement | Location | Notes |
| | WCG1 khekda (crab) | 1928 | 4502, Sir Leslie Wilson | 1,500 V DC, 650 hp Electric goods locomotive | | C-C | National Rail Museum, New Delhi | 10 built by SLM 31 similar built by Vulcan Foundry |

### Indonesia

| Class | Built | Number | Type | SLM Number | Wheel arrangement | Location | Notes |
| SLM HGm4/6 (PJKA Class BB204) | 1993 | BB204 15 BB204 16 | Diesel Electric rack locomotive | 5631-5632 | Bo-2-Bo | Solok depot, West Sumatra | Stored at Solok depot |
| SS 1600 (DKA CC50) | 1928 | CC50 29 (SS 1629) | Articulated mallet locomotive | 3253 | 2-6-6-0 | Ambarawa Railway Museum, Central Java | 16 built by SLM, 14 similar built by Werkspoor |
| SS 1100 (DKA C27) | 1916 | C27 10 (SS 1110) | Baltic express locomotive | 2584 | 4-6-4T | Transportation Museum of Taman Mini Indonesia Indah, Jakarta | 29 delivered between 1916 and 1922, built by SLM, Armstrong Whitworth and Werkspoor. |

### Switzerland

| Class | Built | Number | Type | SLM Number | Wheel arrangement | Location | Notes |
| | 1902 | 5 | Narrow gauge steam locomotive | 1440 | 0-6-0T | Waldenburg railway | Built for the Waldenburg railway; gauge 750 mm (2 ft 5+1⁄2 in); named Gedeon Thommen |
| | 1912 | 6 | Narrow gauge steam locomotive | 2276 | 0-6-0T | Swiss Museum of Transport | Built for the Waldenburg railway; gauge 750 mm (2 ft 5+1⁄2 in); named Waldenburg |
| Ge 6/6 | 1912-1929 | 402, 406, 407, 411, 414, 415 | Narrow gauge electric locomotive | | 0-6-6-0 | Various locations | Built for Rhaetian Railway; gauge 1,000 mm (3 ft 3+3⁄8 in) |

### United Kingdom

| Built | Number | Type | SLM Number | Wheel arrangement | Location |
| 1895 | 2 Enid | Mountain railway rack steam locomotive | 924 | 0-4-2RT | Snowdon Mountain Railway |
| 1895 | 3 Wyddfa | Mountain railway rack steam locomotive | 925 | 0-4-2RT | Snowdon Mountain Railway |
| 1896 | 4 Snowdon | Mountain railway rack steam locomotive | 988 | 0-4-2RT | Snowdon Mountain Railway |
| 1896 | 5 Moel Siabod | Mountain railway rack steam locomotive | 989 | 0-4-2RT | Snowdon Mountain Railway |
| 1922 | 6 Padarn | Mountain railway rack steam locomotive | 2838 | 0-4-2RT | Snowdon Mountain Railway |
| 1923 | 7 Ralph Sadler | Mountain railway rack steam locomotive | 2869 | 0-4-2RT | Snowdon Mountain Railway |
| 1923 | 8 Eryri | Mountain railway rack steam locomotive | 2870 | 0-4-2RT | Snowdon Mountain Railway |