Seiko Cal. 7181 - 671

The 7181-671 is a sought-after Spring Drive piece from Seiko's golden era. The Bidirectional bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-33b39ae276ff]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1966

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