![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,788 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,788 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-x6xomlkg2lyd9fj6g3f3hdl4-ExtraLarge.jpg)
Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,788 for sale from a Trusted Seller on Chrono24
![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)
Seiko Slide Rule vintage chronograph automatic watch Cal 6138 Ref 6138-7000 Seiko Vintage watches - Watches83
![6138-7000] The Seiko Calculator. C and D scale to help you multiply and divide any range of numbers just as quickly as you can type into a calculator. Plus it's a chronograph! : 6138-7000] The Seiko Calculator. C and D scale to help you multiply and divide any range of numbers just as quickly as you can type into a calculator. Plus it's a chronograph! :](https://i.redd.it/y80f8yfb7ze61.jpg)
6138-7000] The Seiko Calculator. C and D scale to help you multiply and divide any range of numbers just as quickly as you can type into a calculator. Plus it's a chronograph! :
![Seiko 6138-7000 Slide Rule Chronograph Automatic Cal 6138B -... for $950 for sale from a Trusted Seller on Chrono24 Seiko 6138-7000 Slide Rule Chronograph Automatic Cal 6138B -... for $950 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/29676884-h1ijr8f6upvcrdltznr3obhn-ExtraLarge.jpg)
Seiko 6138-7000 Slide Rule Chronograph Automatic Cal 6138B -... for $950 for sale from a Trusted Seller on Chrono24
![Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,567 for sale from a Trusted Seller on Chrono24 Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,567 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/25336892-jdasqxes2lu7duicfhgpqy86-ExtraLarge.jpg)