![SEIKO CALCULATOR SLIDE RULE Vintage automatic chronograph watch Cal. 6138 Ref. 6138-7000 + BOX *** SPECTACULAR CONDITION *** Seiko Vintage watches - Watches83 SEIKO CALCULATOR SLIDE RULE Vintage automatic chronograph watch Cal. 6138 Ref. 6138-7000 + BOX *** SPECTACULAR CONDITION *** Seiko Vintage watches - Watches83](https://watches83.com/69707-thickbox_default/seiko-calculator-slide-rule-vintage-automatic-chronograph-watch-cal-6138-ref-6138-7000-box-spectacular-condition-.jpg)
SEIKO CALCULATOR SLIDE RULE Vintage automatic chronograph watch Cal. 6138 Ref. 6138-7000 + BOX *** SPECTACULAR CONDITION *** Seiko Vintage watches - Watches83
![Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,678 for sale from a Trusted Seller on Chrono24 Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,678 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/25336892-4ug1w9j0knmed7p4dm4075l7-ExtraLarge.jpg)
Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,678 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,909 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,909 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-k9eboufxgz1azwcfxgez9eko-ExtraLarge.jpg)