Ebel, Tekton, ref. E9137L83, steel chronograph wristwatchMovement: cal. E137, automatic, 27 jewels, no. 38055Case: no. E9137L83, width. 49 mm, glass back revealing the movementComponents: 2-counter chronograph with central seconds, tachymeter scale, date window, subsidiary seconds counterEbel strap: black rubber with Ebel steel folding claspSignature: dial, movement, caseAccessory: case