Someone asked recently about a booklet that they could get stamped during their travels in Switzerland, but I can't find the post.
Anyway, this might be what they were asking about:
www.mystsnet.com/filea dmin/doc/02_Produkte_S ervices/01_Swiss_Trave l_System/03_Grand_Trai n_Tour/2018_EN_Factshe et_GTToS_myTravel_Stam p_Booklet_Trade.pdf
Thanks for sharing that Alpenrose. I can't find the post either but it's useful to have a reference here.
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