Seiko 6138-7000 Slide Rule Chronograph Automatic Cal 6138B -... for $750 for sale from a Trusted Seller on Chrono24
![6138-7000 ] April 1973 slide rule : r/Seiko](https://preview.redd.it/6138-7000-april-1973-slide-rule-v0-pmudkui2flf81.jpg?width=640&crop=smart&auto=webp&s=0460d76992fa502fd88fbd7d301f73e8b49adf7e "6138-7000 ] April 1973 slide rule : r/Seiko")
6138-7000 ] April 1973 slide rule : r/Seiko
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SOLD — Seiko 6138-7000 Slide Rule
いいね！251件、コメント14件 ― Bertnet69 - Seiko Collectorさん(@bertnet69)のInstagramアカウント: 「SEIKO 6138-7000 " Chronog… | Luxury watches for men, Skeleton watches, Vintage watches
Seiko 6138-7000 slide rule | The Watch Bloke
![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://preview.redd.it/y80f8yfb7ze61.jpg?auto=webp&s=f275e886f865d3e5b0d2dc18e63b9a7bd7de470e "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! :")