Campaign leaflets and mementoes were being produced.

Source: https://guardian.ng/features/and-the-governor-to-be-has-passed-on/

Paper boarding passes were once treasured travel mementoes, a tangible reminder of voyages abroad.

Source: https://krdo.com/news/2023/09/09/getaways-where-cars-and-phones-are-banned/

You were particularly kind to remember me with this impressive gift, as well as your family photographs, and I am delighted to have them for my collection of special mementoes.

Source: https://www.express.co.uk/entertainment/music/1718898/Elvis-Presley-President-Richard-Nixon-gift-gun