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Seiko - "Calculator" Slide Rule Huge Double Chronograph Cal.6138 - 6138-7000 - Men - 1970-1979 in France
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Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,885 for sale from a Trusted Seller on Chrono24
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Seiko Slide Rule vintage chronograph automatic watch Cal 6138 Ref 6138-7000 Seiko Vintage watches - Watches83
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