Seiko Cal. 3891 - 929

The 3891-929 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3891 caliber with 19j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-1bc505d0ed6c]

Also known as: Sumo, Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

43mm

Case Thickness

15.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Champagne

Jewels

19j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1974

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