Light - Side Glass for AJMS Commercial Helmet

Product Features

The term "light" is historically accurate when referring to the window glass in a diving helmet. In nautical terms a fixed window on a ship could be referred to as a light, as in skylight or deadlight.

All A J Morse & Son Diving Helmets made by DESCO use Borosilicate Glass (Pyrex) lights. Borosilicate Glass has much better temperature stability than normal glass. The Mark V helmets used lights with bevelled edges which conform to the frame. 

Unlike the Mark V Diving Helmet the commercial helmet lights are not bevelled. Even though they are made from the same material they are less expensive by eliminating the labor of grinding bevels.