Seiko Cal. 3820 - 710

This Spring Drive model from 1985 features a 41mm Two-Tone case. It features a Navy dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-22b61239c52e]

Also known as: Sumo, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1985

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