Hallmark Cards

We have 2 objects that Hallmark Cards has been involved with.

If you would like to cite this person in a Wikipedia article please use the following template:

<ref name=CH>{{cite web |url=https://www-3.collection.cooperhewitt.org/people/18053361/ |title=Hallmark Cards |author=Cooper Hewitt, Smithsonian Design Museum |accessdate=19 April 2025 |publisher=Smithsonian Institution}}</ref>