OMEGA Speedmaster 1957 Chronograph 38.60 mm, The 1957 Trilogy, Ref. 311.10.39.30.01.001, limited edition no. 2748/3557, case no. 78772093, sold in 2018 An attractive, mint and full-set, limited edition, water-resistant, manual winding, stainless steel tonneau-shaped chronograph’s wristwatch with black “tropical” dial, vintage-style indexes, steel bezel with tachymeter scale, stainless steel Omega bracelet with deployant clasp. Fitted with a Cal. 1861, manual winding, rhodium-plated, 18 jewels, glucydur balance, hesalite glass with Omega logo in the center, screwed case back. Dial, case and movement signed. Diam. 38.60 mm. Thickness 13.70 mm. Approx. overall length 200 mm. Accompanied by a fitted presentation box and outer packaging, user manual, certificate of limited edition, pictograms card, international warranty card, additional Nato strap and additional leather strap with Omega steel buckle. “A 60th Anniversary tribute to one of three classic timepieces released in 1957, this Speedmaster limited to 3,557 pieces, is based on the original “Broad Arrow”, which was not only the first Speedmaster, it was also the first chronograph wristwatch in the world with its tachymeter scale on the bezel as opposed to printed on the dial”. - courtesy of Omega.