Here is a nice example of an all original, copper masthead navigation light.  It measures about 9 1/2 inches tall x about 7 1/2 inches wide.  The 90 degree glass fresnel lens has a few edge chips and for the most part is considered clear in color.  This copper masthead navigation light weighs just over 4 pounds.  The back has four mounting legs which are 6 inches apart vertically and 7 inches apart horizontally.

To access the bulb area, you simply open the door on the back side.  This copper masthead navigation light has been re-wired and a new bulb holder installed.  All of the new electrical parts we install are UL-Listed and rated to work with any voltage under 250 volts.  The bulb holder takes a normal screw in house bulb of 100 watts or equal.