The TRIANG R50 Princess Cylinder Block is a vintage model railway part made of plastic, specifically designed to fit over the chassis of a MkII chassis. Manufactured in 1952, this unit is in a C-6 Very Good grade condition and is suitable for OO gauge model railways. With an analogue control system, this cylinder block is a ready-to-go pre-built piece that collectors and enthusiasts of model railways will appreciate for its authenticity and historical significance.