For many years printer Verhees provided the KNBLO with the regular Four Days Marches postcards. Leo Verhees still sells merchandise related to the Four Days Marches, but now not as an official supplier, but as a sponsor for his charity, Foundation Ruby and Rose, that supports research into the fight against cancer. More information can be found on his site.
https://www.vierdaagsebadges2022-editie104extra.nl/
