Seiko Cal. 5271 - 977

The 5271-977 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5271 caliber with 30j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-71eb876d41fe]

Also known as: Sumo, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

46mm

Case Thickness

8.9mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Black

Jewels

30j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1969

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