Seiko Cal. 5646 - 631

The Seiko 5646-631 represents an important milestone in Seiko's 1987 lineup. It features a Black dial protected by a Sapphire crystal and offers 190m of water resistance. [seikata-wm-85c6738a2155]

Also known as: Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1987

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