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Round scale for determining sunrise and sunset times, suitable for addition to a watch, has a 24-hour display and a double hand that shows both winter and summer time
Round scale for determining sunrise and sunset times, suitable for addition to a watch, has a 24-hour display and a double hand that shows both winter and summer time
Round scale for determining sunrise and sunset times has a simple double hand that shows winter and summer times in parallel and which is coupled to a normal daily clock mechanism and rotates around the central point of the scale.
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