Seiko Cal. 3898 - 631

This Spring Drive model from 1985 features a 45mm Stainless Steel case. It features a Silver dial protected by a Mineral crystal and offers 170m of water resistance. [seikata-wm-0dadb6be75b4]

Also known as: UFO, Rally

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Silver

Jewels

32j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1985

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