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Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,732 for sale from a Trusted Seller on Chrono24
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Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,508 for sale from a Trusted Seller on Chrono24
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SEIKO CALCULATOR SLIDE RULE 1976 Vintage automatic chronograph watch Cal. 6138 Ref. 6138-7000 *** BEAUTIFUL *** Seiko Vintage watches - Watches83
![Seiko Slide Rule vintage chronograph automatic watch Cal 6138 Ref 6138-7000 Seiko Vintage watches - Watches83 Seiko Slide Rule vintage chronograph automatic watch Cal 6138 Ref 6138-7000 Seiko Vintage watches - Watches83](https://watches83.com/14820-large_default/seiko-slide-rule-vintage-chronograph-automatic-watch-cal-6138-ref-6138-7000.jpg)