Hello Cursus, what a great thread you have started and curated for more than a decade! I just discovered this thread, and am astounded at the diversity and quantity of stamps that have been produced.
I stumbled upon an old "album" of the Catalanist movement propaganda stamps, titled: The propaganda symbols of the separatist movements in Spain, 1899-1901". The album language is German, so the album was likely designed and printed in Germany.
The album is tattered, and pages toned and brittle, but there is a wonderful historical description of the movement and more than 500 stamps (many are color variations of a single design, or panes of se-tenant stamps).
Some of the stamps in the album I have seen in this amazing thread, but there are also many that have not been shown.
I would like to share some of the album pages, but am not sure that the scans will be able to show the detail to be visually useful. Nonetheless, here are some pages to start:
Front cover (tattered)

Title page with description of Catalanist movement history

Description of stamp issue listing arrangement of album
