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Seiko - Seiko - "Slide Rule" Chronograph Automatic Watch -- 6138-7000 - Men - 1970-1979 at auction | LOT-ART
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Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,834 for sale from a Trusted Seller on Chrono24
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Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,515 for sale from a Trusted Seller on Chrono24
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