Seiko Cal. 6637 - 146

The Seiko 6637-146 represents an important milestone in Seiko's 1978 lineup. It features a Green dial protected by a Mineral crystal and offers 130m of water resistance. [seikata-wm-add9f97e24f5]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

14.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Green

Jewels

30j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1978

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