No ac power required as this clock is completely battery operated.
Wall clock luminous dial.
The luminous glow on the dial minutes and hour hand of your watch making it easier for you to see the time in the dark.
Radium dials are watch clock and other instrument dials painted with radioluminescent paint containing radium 226.
Types of luminous dials many vintage watches especially military watches have gold or whitish colored paint on the hands or on the numbers on the dial.
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That is exactly what luminous watches are all about.
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The rhythm gemini illuminated wall clock is an 11 clock with an illuminated dial that is activated when the light level is dark the room it is placed by rhythm clocks.
It is similar to every other watches but with added features of luminous to give clear visibility of the time in dark areas.
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A light sensor activates the illumination.
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White frame and glass crystal.
This causes or at least used to cause the numbers and hands to glow.
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On the other hand we would also like.
Luminous dials are a compromise.
This paint is quite likely made of a phosphorescent compound mixed with radium.
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On the one hand we would like to be able to tell the time in the dark without dropping a hundred large on a minute repeater.
Subsequently radium dials have largely been replaced by phosphorescent or occasionally tritium based light sources.
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Radium dial production peaked in the first decade of the 20th century as radiation poisoning was then unknown.