The same antique clocks may be called various names by different experts depending on what region of the world they live in, which can get really confusing. For example, what the British call a "bracket clock" is actually identical to what American dealers call "shelf clocks" or "mantle clocks."

The main categories of antique clocks can also be further broken down into subcategories. For instance, within the broad category of "Beehive" clocks there may also be found subcategories such as a "Gothic" beehive or a "Ripple" beehive. Some may the subdivide the broad category of "Drop trunk" clocks into finer distinctions, such as "Schoolhouse" clocks, "Act of Parliament" clocks, "Wall regulators", "Tavern" clocks, "Short drop", "Octagon drop", and so forth.

Advertising clocks is a collective term used for clocks for promotional reasons which show advertising somewhere on the clock case or dial. The clock may also be used as a portion of the advertising, such as when a clock is integrated into a bigger sign. Most often found as shelf or wall clocks, or more rarely as Long-case or 'Grandfather' clocks, these are wonderful antique wall clocks.

Human beings are fascinated by time, and the passage of time. It is that deep interest that has led to seemingly mundane inventions such as the alarm clock. People's need to measure time and use time have led to technological advances over 6 millenia.

Invented in the latter part of the thirteenth century, most likely by monks living in central Europe, the earliest mechanical clocks had no pendulums and were situated inside churches. They sounded bells hourly but did not have dials or hands.

Clocks were originally placed in the church belfry to utilize the church bell. These iron clocks were created by local blacksmiths and were very heavy and large. It took more than a century before a clock as we know it was invented, one with hands and dials. By early in the fifteen century, small clocks for home use became available which were likely fashioned by gunsmiths or locksmiths. These early antique clocks are very valuable.