HORNBY L5504 A1 A3 BOILER UNDER PAN UNDERPAN FLYING SCOTSMAN LNER GREEN NEW
£3.99
The protrusion on the underside of the Underpan fits into the slot on a Tender Drive Chassis, where the motor would have been, before the A1 and A3 were made into Tender Drive Locos - Hornby retained most of the original chassis.
