Zenith Oversized 39mm Trench Style Early Pilot's Chronometer, Extra-Fine, c.1917

Not a pocket watch conversion, this is an authentic factory built purpose-made pilot's wrist chronometer from WWI by Zenith. Men first started wearing wrist watches in the trenches of WWI and early pilots needed a larger watch that was accurate and more quickly and easily visible than most. Large 39mm Zenith signed nickel double back hinged case with hinged lugs is in superior condition with no scratches, damage or personalization. All covers snap closed smartly and hinged 14mm lugs are secure and proper. Original large military style crown. Original Zenith signed white porcelain dial with red 12 and red inner 24 hour military time register and sub seconds at 6:00 is superb with no chips, cracks or hairlines and with a little of the original radium still intact. Original blued steel cathedral style hands are clean and corrosion free. Inside beats the mint original Zenith signed high grade 15 jewel Swiss movement with micrometric chronometer regulator, that is crisp and clean, freshly serviced and keeping good time. Flawless clear crystal is a likely replacement. Fitted with a new black leather 14mm strap.