Seiko Cal. 6637 - 844

The Seiko 6637-844 represents an important milestone in Seiko's 1986 lineup. It features a White dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-98d35a873e9e]

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

White

Jewels

35j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1986

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