Elegant 1940s/50s chrome plated manual wind chronograph, Landeron movement. Measures 36/37.5 without/with crown. Lug width 18mm. Watch is working well, keeps good time, chrono starts, stops and snaps sharply back to 0. Plating worn on lugs commensurate with age. Minor cracks in glass at 3 and at 10. Has not been serviced and is not guaranteed. Delivered on a standard length 18mm black leather strap (used). Eska was the trade name of S. Kocher & Cie, Grenchen, a well regarded watch manufacture.