- Saint-Imier watchmakers established by Auguste Agassiz.
- Agassiz heads the company and opens the market to the United States to great success.
- Ernest Francillon joins the firm eventually taking it over.
- Es Longines the Longines factory opens.
- Produces the first movement, 20A.
- Wins a award at the Universal Exhibition, Paris.
- Jacques David attends the Universal Exhibition in Philadelphia and returns to inspire the industrialization of Swiss watchmaking.
- Longines pioneers mechanized production.
- By means of its newly mechanized production, Longines produces a simple chronograph, the 20H.
- Longines chronographs produced for Americans are purchased by horse racing aficionados.
- Longines is supplying the majority of New York Sports officials.
- Produces a certified chronometer, the 21.59 calibre.
- Logo is registered.
- Logo registered with the United International Bureaux for the Protection of Intellectual Property (forerunner of WIPO).
- Longines equips Prince Luigi Amedeo of Savoie for his Artic expedition.
- GranPrix at the Universal Exhibition, Paris for La Renommée pocket watch.
- First calibre for a wristwatch.
- Begins development of shaped movements for wristwatches.
- Longines begin development of navigation instruments for aviators.
- Weems Second-Setting Watch for Navigation.
- Lindbergh Hour Angle Watch to be used with a sextant and nautical almanac.
- 13ZN calibre wristwatch patented.
- Longines patents its first self-winding movement, the 22A.
- Longines first quartz clock.
- Used with a 16mm camera to record race finishes for officials.
- First cybernetic quarts calibre – Ultra-Quartz.
- Longines LCD Watch.
- Currently in operation with the same Maker’s Mark.