Seiko Cal. 6644 - 713

The 6644-713 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6644 caliber with 17j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-a601503d5b1d]

Also known as: Golden Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1985

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