Seiko Cal. 5231 - 764

Seiko 5231-764

The 5231-764 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Black dial protected by a Mineral crystal and offers 180m of water resistance. [seikata-wm-af12b5ed72eb]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Titanium
Case Width
37mm
Case Thickness
10.5mm
Lug Width
18mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
180m
Dial Color
Black
Jewels
31j
Frequency
28,800 bph
Power Reserve
37 hours
Year
1973

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