Special Features:

Engraved lens reads aaa test 1 aaa/ai; major components: housing 1, engraved lens 1, t-1 3/4 lsmpd 4, red lamp filters 4, actuator post 1

Properties:

Two or more different types of items having a common mounting or mounted on each other which together forms a portion of a switch but which in itself is not a complete functioning item and cannot be assigned a more definite item name. See also switch section, rotary and contact assembly, electrical.