Seiko Cal. 5631 - 438

Seiko 5631-438

The 5631-438 is a sought-after Automatic piece from Seiko's golden era. It features a Burgundy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-565dd20a3d70]

Also known as: Bullhead, Flighty

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
36mm
Case Thickness
8.7mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
40m
Dial Color
Burgundy
Jewels
27j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1998

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