This High Quality reproduction (Made in the USA) is translucent and made with heat resistant lexan material so it will not warp or burn from the meter lamp.
There were two types of meters used it the 51S-1, one is made by Bartlett, and the other one is made by Honeywell.
The Bartlett does not have any brand printed on it but the Honeywell has the Honeywell name stamped in the lower left side so it is easy to tell which mater face you need.
I have both types. This listing is for the Honeywell meter face and the Bartlett meter face is available in another listing so please check to make sure you get the correct meter face.