Seiko Cal. 6313 - 555

The 6313-555 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6313 caliber with 34j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-a1d72cf25e59]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

12.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1978

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