Seiko Cal. 5658 - 831

Seiko 5658-831

The Seiko 5658-831 represents an important milestone in Seiko's 1986 lineup. Powered by the 5658 caliber with 30j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-fb88a4bf8edd]

Also known as: Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
40mm
Case Thickness
11.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Black
Jewels
30j
Frequency
28,800 bph
Power Reserve
47 hours
Year
1986

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