Seiko Cal. 4430 - 364

This Spring Drive model from 1993 features a 37mm PVD Black case. It features a Navy dial protected by a Mineral crystal and offers 50m of water resistance. [seikata-wm-4f778ecc76c9]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

37mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

34j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1993

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