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Furness Railway 120 class
Type and origin Power type Steam Designer W. F. Pettigrew Builder Sharp, Stewart and Company Serial number 3618–3621 Build date 1890 Total produced 4
Specifications Configuration: ​  • Whyte 4-4-0  • UIC 2′B n2S Gauge 4 ft 8+1⁄2 in (1,435 mm) Driver dia. 5 ft 7+1⁄2 in (1.715 m) Loco weight 36 long tons 2 cwt (80,900 lb or 36.7 t) Fuel capacity Coal Boiler pressure 140 lbf/in2 (965 kPa) Cylinders Two Cylinder size 17 in × 24 in (432 mm × 610 mm) Valve gear Stephenson
Performance figures Tractive effort 12,228 lbf (54.39 kN)
Career Operators FR » LMS Class 120 ("K1") Numbers FR: 120–123 LMS: 10131–10134 Nicknames Seagulls Withdrawn 1924–1927 Disposition All scrapped

The Furness Railway 120 class (classified K1 by Bob Rush)^[1] or "Seagulls", were a class of four 4-4-0 steam locomotives designed by W. F. Pettigrew and built by Sharp, Stewart and Company of Glasgow for the Furness Railway in 1890.

They all passed to the London, Midland and Scottish Railway at the 1923 grouping.

They were withdrawn between 1924 and 1927.

• Locomotives of the Furness Railway

• Casserley, H. C. & Johnston, Stuart W. (1974) [1966]. Locomotives at the Grouping 3: London, Midland and Scottish Railway. Shepperton, Surrey: Ian Allan. p. 103. ISBN 0-7110-0554-0.

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