The old glass was repaired so it could be use to cast a high temperature mold .  The mold and an old piece of glass went into a kiln to form a glass blank.

The blank was cut to size , beveled and the dimple was ground and polished.  The dimple is use to add additional clearance for the center stem.

I hope to update the post with a picture of the restored clock. I have made many lens for old clocks but this is the first one with a additional polished bent and  dimple.

Tags: Antique Glass Repair, beveled glass for clock, convex clock glass, replacement clock glass