It is marked "E.R.O. 6984" and "No. 1.". This form would have been used to keep records of employees involved in such capacities.
WW2 ERA London Midland Scottish ( LMS ) Railway Service Badge Numbered
WW2 ERA London Midland Scottish ( LMS ) Railway Service Lapel Button Hole Badge
WW2 ERA London Midland Scottish ( LMS ) Railway Service Badge - 58803 Numbered
Railway Service GWR Brass/Enamel Lapel Pin WW2 Era
WW2 Era Railway Guard’s British Railways Fob / Button Vintage
Hockley Crossing Box 1942 WW2 era Down Sidings Instructions Shunting UK3/13 Sign