Bleistift reader Tomasz Maped sent in another great find: Miniature Calendar. A web calendar with a miniature photo for every day. There is a big section on stationary-related photos.
You can find some nice examples below.
The images in this blog post has been taken from https://miniature-calendar.com/. I believe that the use of the screenshot shown in this blog post falls under “fair dealing” as described by the UK Copyright service.