Vintage Mallory Portable Bloc Burglar Alarm in Box Duracell Battery

Description

Vintage Mallory Portable Bloc Burglar Alarm in Box Duracell Battery
Untested - Unit is in excellent physical condition.  Comes in a plastic case with instructions.
Takes Size N Battery (not included)
Place Bloc Alarm With Narrow End Under Door, Lodged In the Window, In Your Suit Case, Etc and You're Armed Against Intruders!