Here we have a vintage domed clock glass.
This is old stock, most glasses had labels on which have been removed and cleaned.
Photographed on a lightbox to highlight condition, 
This is in good order with just a small nibble to edge.
Diameter 190.76mm, Inner height approx. 10mm, Thickness 2.15mm.
Please note: Although photographed on a jiffy this is for storage only and will be posted in a box for a safe journey.