Seiko Cal. 6645 - 654

The Seiko 6645-654 represents an important milestone in Seiko's 1979 lineup. It features a Black dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-9c9c6f473582]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

11.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

30j

Frequency

21,600 bph

Power Reserve

59 hours

Year

1979

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