Seiko Cal. 3865 - 966

The 3865-966 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-f7205e3edc73]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

80m

Dial Color

Silver

Jewels

22j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1967

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