Seiko Cal. 5636 - 187

Seiko 5636-187

The Seiko 5636-187 represents an important milestone in Seiko's 1984 lineup. Powered by the 5636 caliber with 28j jewels beating at 28,800 bph, it delivers a 68 hours power reserve. [seikata-wm-05f03e962161]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Two-Tone
Case Width
36mm
Case Thickness
14.3mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
110m
Dial Color
Green
Jewels
28j
Frequency
28,800 bph
Power Reserve
68 hours
Year
1984

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