c1660 – calendar movements were introduced to English longcase clocks.The first American patent issued for a calendar movement was in 1853.Specifically the style and type of clock hand and the dial, both of which have varied over time.
Prices at auction sites are often reflective of the current market value of most any item.
Dating Antique Clocks can be an exact science providing you have the right reference books and the proper experience.
of the original Antique "Atmos I" and "Atmos II", (Mercury Reutter models) the following Chart lists Atmos Clocks beginning with some of the earliest models (or calibers) and their respective serial numbers: Determining the value of an Atmos Clock depends on the model, age and the over-all condition of the clock and the actual value can vary significantly depending on what the market will bare at that particular time.
As of this posting, the more common types of Atmos clocks have been trading at prices as low as $300 and as high as $1,200.
Aside from the different Cases and Dials, the Pendulum on an Atmos Clock can also be different from one model to the next.
For Example: The Pendulum of an "Atmos Caliber II" has straights, black lines (see photo), the Pendulum of a Caliber 519 has round "dimples", the Caliber 526 has wide vertical indentations and the Caliber 528 has thin vertical indentations.
A few simple things that can point you in the right direction and at the correct period for your antique wall clock, advertising clock or bracket clock.
The construction of various parts can and will help in dating your antique clock.
- Clock runs perfectly; case is in perfect condition, no fading and no highline scratches-even at very close inspection; often original box, packing material and documentation included.