Seiko Cal. 5231 - 697

Seiko 5231-697

The 5231-697 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Navy dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-d1e409d19061]

Also known as: Monster, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
11.4mm
Lug Width
22mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Navy
Jewels
27j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1973

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