The Glycine Airman SST was made for U.S. Air ... The Airman SST is both a 24-hour watch and a GMT watch. The first means that it tells time on a 24-hour scale, not a 12-hour scale.

Welcome to Watches You Should Know, a biweekly column highlighting little-known watches with interesting backstories and unexpected influence. This week: the Glycine Airman. A watch executive walks ...