1910 Tavannes (Cyma ) Gents Sterling Silver Borgel cased Trench Watch
 
The case is Sterling Silver and Hallmarked London 1910, the case which is in very good condition was designed by Francois Borgel and was the first Dustproof and Waterproof case ( although most would say it was water resistant the first fully waterproof watch was invented by Charles Depollier in 1918) .
The dial is in very good condition for its age, 
Inside the case is a Tavannes Swiss Jewelled Movement 
 
Cosmetically overall in very good condition and running well,