The value of an Atmos clock may lie in its condition more than in its serial number or age. The most common Atmos types in fairly good condition can fetch anywhere from $300 to upward of $1,000. This is for model numbers 519, 526, 528 and 540. These clocks have the standard brass and gold-plated cases.

How do I stop my Atmos clock?

To set your clock back, stop the clock by using the Pendulum locking lever. After one hour or so has passed, start the clock again and adjust the time if needed with the minute hand only (never touch the hour hand).