Seiko Cal. 5631 - 998

The 5631-998 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 120m of water resistance. [seikata-wm-1969e9bc28f2]

Also known as: UFO, Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

35mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Burgundy

Jewels

35j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1996

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