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Book: American Genius - 19th century bank locks & time locks

This book is very interesting and informative although this book is writing about locks originally.

If you would like to know more about Time Locks and Alarm Timers, this is a nice book. The photos are big, sharp and clear.

Total pages: 368

Pages on time lock: 96

Pages on Alarm timer: 16

Sample Pages
American Genius

P. 252

Sargent & Greenleaf's Triple B and G Time Locks

American Genius

P. 333

Bankers Electric Protective Association Alarm Timer

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