My Dad gave me his old International clock (Style No. D.G. 561-2, Serial No. 563479, Date October 23, 1939) made by International Business Machines Corporation (IBM). He purchased it at an estate sale a few years back. As seen in the photos, it has 3 wires that come out of the back of the clock- all black. I am looking for instruction on how or if I can wire this clock to "plug in"; also assuming you must need some sort of a master control to adjust the time electronically? Would anyone have a copy of a vintage owners manual digital or otherwise for this? Thank you, James in Wisconsin
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