Vintage 400 Day Anniversary Mantel Desk Table Clock Glass Dome & Brass Germany Works, battery operated , battery is not included. I believe that the rotary mechanism needs to be twisted anticlockwise manually and released to get it started. Battery operated, battery is not included Measurements are shown on the photos. Please note that this is a vintage item and may have some wear to it due to its age. Please check the photos carefully as they form part of the description, to ensure you are happy with the condition of the item. Thank you Inv600
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