BR (Southern Region) / Southern Railway Headcode Discs - OO Gauge (Pack of 10)

British Railways (Southern Region) / Southern Railway - Headcode Discs 
These discs have a lamp bracket slot on the back that may allow fitting to your models.
Discs are supplied in a pack of 10 unpainted.
After the 1923 grouping all the different headlamp signals used by the constituent companies were combined into a standard Southern Railway six-position code.
The use of these discs continued on the Southern Region into British Rail days until the late 1960s.
A white disc is shown during daylight hours, and a white lamp during darkness, to designate the route that the train is operating on and also special workings.