Seiko Cal. 7138 - 318

The Seiko 7138-318 represents an important milestone in Seiko's 1971 lineup. Powered by the 7138 caliber with 24j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-a0ba34263cc1]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

45mm

Case Thickness

13.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1971

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