Seiko Cal. 5644 - 630

The Seiko 5644-630 represents an important milestone in Seiko's 1966 lineup. It features a White dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-f7e00bac8545]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

34mm

Case Thickness

15.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

32j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1966

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