As found on service sheet 459 for R3989, R3990, R3991.
Hornby S1010 Valve Gear Screws [2( Long Shank Used But Good )
Hornby X7659 Valve Gear & Connecting Coupling Piston Rods For Class W1 Hush Hush
HORNBY X1475 VALVE GEAR LEFT SIDE SCHOOLS CLASS & D49 HUNT SPARES REPAIR NEW
