Seiko Cal. 6644 - 631

The 6644-631 is a sought-after Automatic piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-5fa9d0eeba44]

Also known as: Helmet, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1977

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