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SEIKO CALCULATOR Vintage automatic chronograph watch Cal 6138 Ref 6138-7000 *** LARGE DIAMETER *** Seiko Vintage watches - Watches83
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Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,678 for sale from a Trusted Seller on Chrono24
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Seiko - “Calculator” Slide Rule Automatic Chronograph. 6138-7000 - 265636 japan J - Men - 1970-1979 at auction | LOT-ART
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