Seiko Cal. 3891 - 609

The 3891-609 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3891 caliber with 27j jewels beating at 36,000 bph, it delivers a 41 hours power reserve. [seikata-wm-5c4aadb2cfee]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

11.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

130m

Dial Color

Navy

Jewels

27j

Frequency

36,000 bph

Power Reserve

41 hours

Year

1965

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