Nice heavy dome probably from the 50s or 60s, weighs 1 lb 7 ounces which is pretty heavy for a 400 day clock dome. Exact measurements are 5 1/2 inches diameter and 10 3/4 inches tall and the glass is around 3/16ths inch thick on average. This is an old dome so it has cooling rings, air bubbles, light scratches here and there but is nice and clear and the bottom edge surprisingly free of major chipping. This is one of the nicer domes I've had for sale in a while.
The last picture shows what the clock looks like on a standard 400 day clock from 1953, clock shown is not included.
All of my items are picked up by the courier on the same or next business day so you get your item as quickly as possible.