Certina

Founded in 1888 by brothers Adolf and Alfred Kurth in Grenchen, Switzerland (originally operating under the name Kurth Frères), Certina officially registered its current name in 1939 - derived from the Latin certus, meaning "certain" or "sure." Positioned within the Swatch Group alongside sister brands Tissot and Hamilton, Certina has long been recognized for producing high-durability sport watches and extreme-environment timepieces. The turtle shell motif stamped on their casebacks, adopted in 1960, remains an enduring symbol of the brand's commitment to mechanical robustness and water resistance.