Postalisch Werk (Postal Work) is a Mather Seerlo comic book and other related activity that explores philately in the broadest sense: stamps, mail art, Fluxus, weird mailboxes, VW Fridolin, Redwing Postman Chukka, Switzerland, etc.
MT Shadow makes appearances. See Stamps (after H.R. Fricker)
Research IG account: @postalischwerk