I think this is product R43. It is solid now though.
Vintage Triang R43 Signal Very good working condition
Vintage Triang R43 Hand Operated Single Arm Signal VGC Unboxed Ref JF47
OO/HO Vintage Triang R43 Diecast Single Arm Signal Home / Distant
TRIANGHORNBY/TRIANG REPLACEMENT PLASTIC/NYLON LOCO MOTOR BRUSH HOLDER XO3/XO4
Railway Accessories 8Pcs HOOO Scale LED Signal Lights for Model Trains
Vintage Tri-ang R43 signal (round pole) .
