Seiko Cal. 6637 - 613

The Seiko 6637-613 represents an important milestone in Seiko's 1996 lineup. It features a Green dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-554935189875]

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1996

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