Seiko Cal. 3851 - 182

This Spring Drive model from 1971 features a 41mm Two-Tone case. It features a Silver dial protected by a Sapphire crystal and offers 200m of water resistance. [seikata-wm-f3eeaa305393]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Silver

Jewels

34j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1971

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