Military Vehicles, February 1997,: Can anyone identify this part !

Can anyone identify this part !

Rodney A. Walker (ra.walker@qut.edu.au)
Fri, 28 Feb 1997 09:08:38 +1100

I have come across some strange parts in mil style boxed equipment. I =
think that it is of UK origin, but hopefully one of you guys can tell =
me. The numbers on the boxes are;

6230-99-942-7881
Lamp Operators
No. 6B
QTY. ONE

Not to be opened
until required
for use

Any help is greatly appreciated.

Rod