This is the website for the American Philatelic Society.
In Finnish with some English entries. A blog about these stamps or rather, the postal history of the model 1930 stamps by Mikael Collan.
Postal History of Finland 1889-1918
Postkort fra Struer
Posthistorie fra Struer
GØRDING VEMB BUR Postkort og Posthistorie
This FDC exhibit won Gold at Minnestoa Expo and Filatelic Fiesta in 2015.