Seiko Cal. 3831 - 109

The 3831-109 is a sought-after Spring Drive piece from Seiko's golden era. It features a Burgundy dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-43f5dc771f25]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Burgundy

Jewels

27j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1988

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