Seiko Cal. 6398 - 440

The 6398-440 is a sought-after Spring Drive piece from Seiko's golden era. It features a White dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-6dd283d8e673]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

41mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1974

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