Seiko Cal. 5645 - 671

The 5645-671 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5645 caliber with 30j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-2296ce45b70f]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

44mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1970

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