The badge likely served as a promotional item or souvenir, given to participants or sold during tours.
1960's Vintage Continental Tours-Leeds England Badge [Anglo-Belgian-Tours]
VINTAGE QUAINTON ILLUSTRATED RAILWAY GUIDE 42 PAGES
1891 Iowa Annual Train Report WABASH RAILROAD ~ 20 Pages Of Railway Information
LONDON TRANSPORT MUSEUM 1980 GUIDE BOOK 32 pages some RAILWAY interest