An HO model of the Brookline, of the Boston & Worcester Railroad. Built in 1834 as a Bury 2-2-2, the engine served the as 'Lion' until being rebuilt & renamed as the Brookline, wherein it  was rebuilt with a Jervis Pilot Truck and Cab. The engine later went on to serve the Portland and Kennebec Railroad of Maine, where it was renamed 'Farmington'

The model will require a 36" pony wheel, as well as a 54" - 56" drivers on 2mm Axle. A set of smaller pilot trucks will also be required, I have used New Tool Bachmann 4-4-0 trucks (These are the smallest I have found at present).