The Three General Types of Watchman's Time Recording Equipment
Three distinct types of watchclocks have existed side by side since the middle of the 19th Century – stationary, electrical, and portable. Each offers unique approaches to assuring a guard's location when a registration is made.
All three types provide a high degree of certainty that a watchman was where the registration indicates he was, and when. Within this album, you'll find facts and
photographs regarding forty historic watchclocks.