Here we have a lovely example of a 1918 Zenith silver cased Chronograph pocket watch. This is an early chronograph calibre from Zenith, which is of excellent quality. The classic white enamel dial has the 60 minute/seconds track with 1/5th seconds graduation. It has the black Roman Numeral hour markers, with the inset 30-minute counter at 12 o’clock. The sub-second dial is inset at 6 o’clock, with the railroad track and 10 second Arabic graduations. It is a sterile dial, lacking the Zenith signing. This is indicative of the early pieces sold in the British market. The hands are of spade & whip style, in the thermally blued tone. The central second has the moon counterbalance which catches the eye. The two sub-dial hands are also original. 
The case is of open face configuration, with the double hinged back. The crown and loop and good and original, with the Chronograph operated by depressing the button on the crown. 
The case back has the polished finish. Inside it has hallmarking for sterling silver from Glasgow assay office dating to 1918, with the date letter ‘u’. It is also marked with the ‘ZWC’ makers mark. The case is marked with the serial number ‘3062142’. Both the outer and inner case back seal tightly with a good hinge.
The movement is a beautiful, early Chronograph calibre from Zenith, dating to 1918 (serial number 2236884). It has the gilt finish which is in good cosmetic condition. The movement service history is unknown. The chronograph is functioning well and is it keeping very good time within 10 seconds variation a day. It has a high amplitude of 345 degrees. 
 
It comes on a circa 1900 Curb link Sterling silver albert chain, with the individually marked links. It has the T-bar with the bloodstone/ fob spinner. 
 
Please see the images as these compliment and aid the description provided below.
A further condition report is below.
 
Dial:
The dial is in very good original condition. It has no marks, cracks, chips or even hairline fractures. The tone is bright white with the clear black signing. 
 
Hands:
The hands are original. They are in good condition, with the bright thermally blued tone. They have no corrosion of bending, just light marks.
 
Glass:
The glass appears original and is in good condition with only light marking associated with age.
 
Loop:
The crown, stem and loop are original and are in good condition. 
 
Case:
It is an open face pocket watch, with a hinged front which seals tightly. It has light surface scratching associated with age.
 
Caseback:
The case back is double hinged. The polished outside has light marking associated with age. Inside the hallmarking is clear. The hinge is good and is seals tightly. The inner back also has a good hinge and seals tightly. 
 
Movement:
The movement is an early Zenith chronograph calibre. It displays the hours, minutes, constant seconds, central chronograph 60 seconds and a 30-minute counter. 
The service history is unknown but is in good condition. It has a daily variation of within 10 seconds per day. It has an amplitude of 350 degrees and a beat error of 0.1m/s.
 
Case dimensions:
Case width: 51.5mm
Case length: 51.75mm
Case length with crown: 67.5mm
Case length with crown loop: 73.25mm
Case Depth: 14.8mm