![My Eastern Watch Collection: Seiko Prospex Sky Slide Rule Bezel SRPB61K1 Navitimer (similar to SRPB57 and SRPB59) - A Manual Computer with Limited Use, A Review (plus Video) My Eastern Watch Collection: Seiko Prospex Sky Slide Rule Bezel SRPB61K1 Navitimer (similar to SRPB57 and SRPB59) - A Manual Computer with Limited Use, A Review (plus Video)](https://2.bp.blogspot.com/-4g8iY4zZ-SI/XZqSMbg50sI/AAAAAAAABmY/e9orjOmcvsEOs2v5yGU9THX3ltP_LI1RgCLcBGAsYHQ/s1600/Figure1_Multiplication_C-D.jpg)
My Eastern Watch Collection: Seiko Prospex Sky Slide Rule Bezel SRPB61K1 Navitimer (similar to SRPB57 and SRPB59) - A Manual Computer with Limited Use, A Review (plus Video)
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-qh534tp7yg1fvkmnfyjavj1r-ExtraLarge.jpg)
Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-bsiycyh9jnhjvfbbzqubx3ld-ExtraLarge.jpg)
Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-1esqaewu6su8bq0aj8qeioon-ExtraLarge.jpg)
Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-svgsjzib3z2ozr2nvgrf57ia-ExtraLarge.jpg)
Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24
![Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,511 for sale from a Trusted Seller on Chrono24 Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,511 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/25336892-jdasqxes2lu7duicfhgpqy86-ExtraLarge.jpg)
Seiko Rare Calculator Slide Rule Vintage Automatic Chronograph... for $2,511 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 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 $2,733 for sale from a Trusted Seller on Chrono24
![Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24 Seiko CALCULATOR SLIDE RULE Vintage automatic chronograph... for $2,733 for sale from a Trusted Seller on Chrono24](https://cdn2.chrono24.com/images/uhren/24871896-0kll6n1qn4sr99qc2wfqb83h-ExtraLarge.jpg)