Round mineral & sapphire glasses are fixed onto the watch by either friction or glue.


Friction fixed glasses have a nylon ring holding it in place. Using an eyeglass look at the side of the glass and look for a white ring (occasionally green of black) between glass and case.
Glued glasses are glued using epoxy resin or UV glue. These are getting rarer as the manufacturers find it cheaper to use the nylon rings

Both methods follow the same steps

Now you are ready to fit the glass.

Friction fitted glass with nylon ring: place glass in place and press against wooden post or using a case back press to squeeze glass into watch case.
Glued Glass: I use epoxy resin. Place a small amount of mixed glue into the seat for the glass as evenly as possible. Wipe the excess glue away with your finger (I have never found a tool as good as a finger for smoothing and evening the glue, but you do need to wash your hands). Place the glass into its seat and and glue. the glue should be almost unnoticeable. Allow to dry and remove any excess glue before reassemble paying particular attention to the dial seat.

clean finger prints and marks from glass

reassemble

Pressure Test the watch if the customer desires.

 

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