Seiko Cal. 5231 - 377

Seiko 5231-377

The 5231-377 is a sought-after Automatic piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-79e34adffa47]

Also known as: Monster, Sportsmatic

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
15.5mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Green
Jewels
30j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1972

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