B503 3 Aspect (R/Y/G) Standard Square Head Signal option-set-180 DCP-ATB have Blue and DCD-ATW

DCP-ATB have Blue and DCD-ATW contains White LEDs

Technical Specification: Length: 174mm

Length: 271mm

Use with classic or modern power

B503 3 Aspect (R/Y/G) Standard Square Head Signal option-set-180 DCP-ATB have Blue and DCD-ATW3 light signal red green yellow standard square head This 3 aspect signal is placed at the side of the track. A red light indicates stop, a yellow light indicates caution the next signal is red and Green indicates permission to proceed or route clear. . It is suitable for any layout based from around 1970 onwards, when this style of signal head came into use. Examples could still be found on the network until 2009, when the new slimmer signals became