Seiko Cal. 5688 - 366

The 5688-366 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5688 caliber with 27j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-5cb83f3e3813]

Also known as: Bullhead

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1969

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