O B McClintock bank vault burglar alarm
O B McClintock bank vault burglar alarm
very early 1920 patented O B McClintock burglar alarm system relays
O B McClintock patented burglar alarm relay panel normally enclosed within alarm bell box . I believe that this is one of, if not the earliest model.
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Uploaded on October 17, 2009
very early 1920 patented O B McClintock burglar alarm system relays
O B McClintock patented burglar alarm relay panel normally enclosed within alarm bell box . I believe that this is one of, if not the earliest model.
1,534
views
0
faves
0
comments
Uploaded on October 17, 2009