St. Fridolen is the traditional founder of the Monastery of Säckingen, Baden in the 6th century. Most modern historians believe that this attribution is not authentic. Still, the stamp was issued in 1988 to mark the 600th anniversary of the Battle of Naefels in which greatly outnumbered Swiss defeated a much superior Austrian army. The stamp shows St. Fridolin's banner, based on a miniature in a medieval manuscript,  under which the Swiss fought.