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 beveled. Even though they are made from the same material they are less expensive by eliminating the labor of grinding bevels. 

The third generation Morse Commercial Helmet glass will fit the DESCO Heavy Commercial Helmet and the DESCO Lightweight Commercial Helmet. DESCO helmets up to the early 1970s used glass lights. Later DESCO helmets all used acrylic lights.