Seiko Cal. 3866 - 681

The 3866-681 is a sought-after Automatic piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-f6b2be4b9f9d]

Also known as: Rally, Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1988

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