Seiko Cal. 6633 - 578

This Spring Drive model from 1989 features a 37mm PVD Black case. It features a Black dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-dbe1cf427edd]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1989

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