Seiko Cal. 6366 - 657

The 6366-657 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6366 caliber with 19j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-738b10a3ac09]

Also known as: Tuna, Emperor

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.5mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1978

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