G&SWR 99 ClassThe Glasgow and South Western Railway 99 class was a class of four 0-2-2-0 steam locomotives designed in 1855.DevelopmentFour examples of class designed by Patrick Stirling were built for the GSWR by R and W Hawthorn between April and August 1855. Little is known about the class which is variously described as having a "dummy crank" or a "crank axle."WithdrawalThe design was apparently unsuccessful, and all were withdrawn by James Stirling in 1866 and 1867.