John G. Shedd Aquarium Vintage Souvenir Shell Night Light Cover, Chicago, Ill.

Description

VINTAGE NIGHT LIGHT COVER FROM THE JOHN G. SHEDD ACQUARIUM
My Grandfather was in the Navy when he purchased this souvenir
This is just the shell, no night light is included.  Not really sure how it would work, yet my Mom told me that is was a night light cover.
Since they don't make the old style this works as a decoration or again a souvenir.