Seiko Cal. 5671 - 139

The Seiko 5671-139 represents an important milestone in Seiko's 1978 lineup. Powered by the 5671 caliber with 20j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-f42f454e2890]

Also known as: Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

9.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Silver

Jewels

20j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1978

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