Seiko Cal. 6631 - 503

The 6631-503 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-e108ceb070ca]

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

14.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

Silver

Jewels

17j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1991

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