Antique ww1 1916 military trench wrist watch early borgel rare model collectible diameter 40 mm (including crown), 34 mm (excluding crown). Mark from Francois Borgel, another mark which is not visible, xxNILA WATCH SWISS MADE, the serial number 33994, 925 from 92.5 silver purity, the London mark,'a' from the year 1916 and a 6.