This is a Mid Size Gents 1922 London Hallmarked ( import mark G  for 1922) 9ct Gold Vertex Trench Watch, the case is designed by Francois Borgel, the case itself is in good condition with only light wear apparent. The dial is in very good condition there is a chip at the 10 mark. 
Inside the case is a signed Vertex Swiss Lever Movement.
Overall cosmetically this is in very good condition for