Berko Colour Light Signal BN28 Sealed. With Light Emitting Standard. 2-Light Red/Green Standard.
Berko Railways BN28 Colour Light Signal 3-Light Red/Yellow/Green Standard Sealed
British Railways in Colour No 1 A BRILL Special published by Irwell Press 1999
Hornby Catalogue 2013 Edition 59 Model Railways full colour centenary year
British Railways Introduction Colour Light Signals Parks Bridge Chislehurst 1962
Berko B228 OO Gauge Red/Green Square Head 2 Aspect Home Colour Light Signal
Berko B228 OO Gauge Red Green Aspects Colour Light Signals Railway Blister Pack.
