The C359 caliber was Seiko's second digital LCD calculator watch. This C359-5010 was produced in 1980. It can dis… in 2023 | Retro watches, Vintage watches, Stylish watches
Do MATH Anywhere Right From Your Wrist Vintage 1980s Ultra - Etsy
Seiko - LCD Digital Calculator Alarm Unworn - Ref C359-5000 - Men - 1970-1979 in Turkey
Project or Parts Rare Seiko C359 5019 Calculator Silver - Etsy