 and very soon was known for its "Ratchet-buckle" watchbands (introduced in 1920), the "Scissors Action Expansion Band" (introduced in 1936), the ladies' "Mignon" watchbands (introduced in 1939), plus costume jewelry.In the 1930s, Speidel was the first company in the world to introduce ID bracelets.During World War II, the company briefly produced cathode-ray tubes.