There is a 1968 calendar on the inside flap.
Vintage 1967 Northern Pacific Railway Wall Calendar Railroad Train Art
Northern Pacific Railroad 1967 Industry List PDF Pages on DVD
The Consolidated Code of Operating Rules by Butte Pacific Railway 1967 Train VTG
USA 1948 Railway FDC NORTH COAST LIMITED (Northern Pacific Railway)
Northern Pacific Railway Williams WRENCH Heavy Cast Iron Tool 11.5”
NORTHERN PACIFIC RAILWAY-1969 Presidents Safety Award, Ratchet Tools/US Made!