Jump Hour – 20th Century Watches

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Mentor 17 jewels

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Abbott (Buler) jump hour

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Tenor Dorly

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Gruen Electronic (jump hour and minute)

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Dugena Digital Automatic

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Amida Digitrend

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JAZ DERBY SWISSONIC

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Maty Besancon

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Osco Buler Jump Hour

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Oriosa Swiss Digital Automatic

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