An exhibition quality model of a 3 1/2 inch gauge WWI 2-6-2 side tank locomotive, No.1227, built to 1 3/4 inch to the foot scale based on the American Loco Company two foot gauge 1917 design for service in World War I working in France behind the trenches by The Royal Engineers, built by Mr Sayer of Sussex between 2004 and 2009 and based on the Mountaineer design by Don Young, with silver soldered copper round top boiler, fittings including water sight glass, ratchet lever operated regulator, pressure gauge, safety valves, direction control lever, cab control drain cocks to cylinders, hand feed pump, steam brakes and hand brake to all driving wheels, clack and blow-down valves, chassis details including twin outside cylinders 1 1/2 inch by 2 1/4 inch stroke with Walschaert's valve gear to slide valves, planked flooring to cab and cab operated whistle, injector and ratchet type mechanical oiler system, fitted with steps, handrails and lamp irons in World War I livery having cab sides plates American Loco Corporation 57110 1917 , 102cm long, the cab 30cm wide. Boiler History: Boiler supplied by Western Steam Boilers of Bridgwater, Somerset, purchased on 5th July 2004. Model completed in 2009. Hydraulic test pressure 170 psi. Working pressure 85 psi. Southern Federation of Model Engineering Societies Hydraulic test certificate No.SF113394. Expired on 23rd January 2013. Along with other history and steam test certificates. Note: A great deal of research was carried out in the building of this historic and unique model, including information supplied by the Imperial War Museum, Royal Engineers Museum, The Royal Logistic Corps Museum and The National Railway Museum.