The only dates I can find suggest that the original drawings were made in the 1940s.
GWR 150 folder - souvenir pack of charts, maps, articles etc.
1970s empty portfolio folder for History of Railways posters
Burlington - Denver Zephyr Folder Menus - Lot of 3 - 1969/1970
VERY LARGE & RARE FOLDER OF TRI-ANG HORNBY RAILWAYS SERVICING SHEETS, 1955-90
BR (WR) Synopsis of Course of Instruction for Safe Working of Railways
