Seiko Cal. 5656 - 399

The Seiko 5656-399 represents an important milestone in Seiko's 1985 lineup. Powered by the 5656 caliber with 17j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-ec8370da793e]

Also known as: Monster, Golden Tuna

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

38mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Burgundy

Jewels

17j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1985

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