Seiko Cal. 7172 - 657

Seiko 7172-657

This Spring Drive model from 1987 features a 37mm PVD Black case. Powered by the 7172 caliber with 27j jewels beating at 28,800 bph, it delivers a 65 hours power reserve. [seikata-wm-7a07f677cf98]

Also known as: Sumo, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
PVD Black
Case Width
37mm
Case Thickness
15.3mm
Lug Width
18mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Silver
Jewels
27j
Frequency
28,800 bph
Power Reserve
65 hours
Year
1987

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seikata-wm-7a07f677cf98