Seiko Cal. 6613 - 631

The Seiko 6613-631 represents an important milestone in Seiko's 1985 lineup. Powered by the 6613 caliber with 21j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-c69565ab0d05]

Also known as: Golden Tuna, Arnie

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

46mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Navy

Jewels

21j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1985

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