IWC World War I trench style 18ct gold wristwatch, manual wind, cal 64, with unusual 18ct yellow gold screw case signed Francois Borgel for improved water resistance, hallmarks date to c1913 Chester, the white enamel dial featuring black Arabic numerals, electric blue hands and subsidiary seconds dial, a/f (minor chip to dial to the left of six o'clock position), movement #080699, case diameter 33 mm, with monogram engraving to case back, winding and running smoothly, with matched black leather strap.. Provenance: vintage watch Co. Sydney NSW, 2016