I have narrowed down the glass for my Roamer Vanguard to the 311802 on roamers chart shown below as X7311 but am having trouble selecting the correct replacement from the many different ones on the cousins site, can any one point me in the right direction please as there isnt a cross reference for this number I can find.
The current glass has a silver coloured metal ring fitted inside and has the following dimensions
OD = 30.60 mm
ID = 27.95
Height 4.34 mm
Thickness = 1.22 - 1.26 mm varies over the surface of the glass, the middle being the thinnest