Seiko Cal. 6331 - 902

The 6331-902 is a sought-after Spring Drive piece from Seiko's golden era. It features a Green dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-647828d7127f]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

29j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1986

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