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WebFeb 6, 2024 · The first mechanical alarm clock was invented by American Levi Hutchins of Concord, New Hampshire, in 1787. However, the ringing bell alarm on his clock could ring only at 4 a.m. In 1876, a mechanical wind-up … WebVintage 1940's Westclocks Baby Ben Mechanical Alarm Clock Working. Sponsored. £50.00 + £4.69 Postage. vintage MOM Mechanical wind up alarm clock. £2.50 + £3.00 Postage. vintage/retro Mechanical wind up alarm clock. £3.00 + £2.90 Postage. Vintage dimond Mechanical Alarm Clock WORKING. WebApr 1, 2000 · The moon phase dial works just like the hands of the clock do. The minute hand on a clock moves at the rate of one revolution every hour. The hour hand moves at one revolution every 12 hours. The moon phase dial moves at a rate of one revolution every 56 days or so. The moon's cycle is 28 days, and the moon phase dial generally has two … cadmium hot work