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![6138-7000 ] April 1973 slide rule : r/Seiko](https://i.redd.it/6138-7000-april-1973-slide-rule-v0-pmudkui2flf81.jpg?width=3024&format=pjpg&auto=webp&s=fae1221d53dfc3168c1c0a6abc539beab2660464 "6138-7000 ] April 1973 slide rule : r/Seiko")
6138-7000 ] April 1973 slide rule : r/Seiko
Yesterday's Watch Review, Today! The Seiko 6138-7000 Slide Rule - YouTube
Seiko - “Calculator” Slide Rule Automatic Chronograph. 6138-7000 - 267434 - Men - 1970-1979 in Turkey
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SOLD — Seiko 6138-7000 Slide Rule
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SOLD — Seiko 6138-7000 Slide Rule
Seiko - Calculator Slide Rule - 6138-7000 - Men - 1970-1979 - Catawiki
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![6138-7000 ] April 1973 slide rule : r/Seiko](https://i.redd.it/6138-7000-april-1973-slide-rule-v0-k1rs4103flf81.jpg?width=3024&format=pjpg&auto=webp&s=0125e7a361dcfbe37c1cca99326dbe540dc6426b "6138-7000 ] April 1973 slide rule : r/Seiko")