LONGINES 13 ZN seltener großer Flyback- Chronograph mit schwarzem original Zifferblatt in GG 750/000, Schweiz um 1937, Handaufzug, 3-tlg. Geh. Ref. 3756, Boden & Glasrand aufgedr., Zifferbl. m. gold. Zahlen gleichmäßig pat., Tachymeterskala, gold. orig. Zeiger, verg. Werk 13 ZN, kantenpol. Kadratur, 17 Steine, Gluc.-Unruh m. Breg.- Spir., D. ca. 37 mm, Überh. empf., EZ 2-3, aus Sammlungsauflösung LONGINES 13 ZN rare big flyback-chronograph with black original dial in 18k yellow gold, Switzerland around 1937, manual winding, 3- piece construction case reference 3756, snap on case back & bezel, original dial with gilded numerals even patinated, tachometer graduation, gilded original hands, gold plated movement 13 ZN, beveled cadrature, 17 jewels,glucydur-balance with Breguet-hairspring, diameter approx. 37 mm, overhaul recommended at buyer's expense, condition 2-3, property of a collector