They were attached to the locomotive both in the sets and also individually boxed ones. This one is in perfect condition and still has its bright red string attached to it.
Hornby Railways Locomotive Lubrication And Maintenance Chart
Triang Railways OO Gauge Maroon Mk1 Passenger Coach Locomotive Body Only Unboxed
Triang Railways Transcontinental 4-6-2 Locomotive TR2335 Black OO & Tender
Vintage Triang R319 Operating TC Mail Coach Set Triang Railways Livery Boxed
Special-Triang Railway R402 Operating Royal Mail Coach - Vintage Triang Railways