Seiko Prospex SRQ053 Speedtimer Chronograph Black Dial Automatic Luminox Field Atacama Day Date A.1927 The Khaki X-Wind Automatic is

The Khaki X-Wind Automatic is the world’s first drift-angle calculator in a watch

seconds hand and dial for night reading capability

cockpit- and table watch

Strap: Brown alligator strap

SOLAR POWER Powered by any light source

Seiko Prospex SRQ053 Speedtimer Chronograph Black Dial Automatic Luminox Field Atacama Day Date A.1927 The Khaki X-Wind Automatic isCaliber Number: 8R48 Movement Type: Automatic with manual winding Precision: +25 to 15 seconds per day Power Reserve: Approx. 45 hours Jewels: 34 Case Material: Stainless steel (super hard coating) Case Thickness: 14. 6mm Case Diameter: 42. 0mm Lug to Lug: 49. 5mm Crystal: Dual curved sapphire crystal Crystal Coating: Anti reflective coating on inner surface LumiBrite: LumiBrite on hands and index(es) Clasp: Three fold clasp with push button release