Seiko Cal. 5688 - 366

Seiko 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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