S.F.L. (Societe Francaise Longines)....I am guessing circa mid- to late-1930s. I know very little about S.F.L. other than it was Longines agent in France for a number of years beginning in the early-mid 1930s. Longines watches distributed by S.F.L. are marked "Longines" on the dial. S.F.L. apparently also marketed watches of its own design, which are marked "S.F.L." on the dial, such as this example. The case is stainless steel....the body of the watch measures 13.5mm x 17.5, lug-to-lug 23.5mm, strap width is 9mm. I would welcome any additional info anyone might have about S.F.L. or thoughts about the movement's manufacturer. Cheers
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