I was really impressed with Boomer’s recent post of double-sided scale magazines and newspapers. Things like that are extremely useful for modelers like me. Here are a few selections of single-sided signs and posters that I have previously posted on another large scale site. I thought they would be better suited here on LSC in the Reference folder. Each of the following files is a single 8 1/2" x 11" sheet of items, approximately scaled for garden railroad use.
Bob
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/1919_posters.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/1939_posters.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/1942_posters.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/1949_Posters.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/1984_posters.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/Commercial_Signs.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/License_Plates.pdf
http://freightsheds.largescalecentral.com/users//bob_hyman/signs_and_posters/Safety_Posters.pdf