Seiko Cal. 6366 - 657

Seiko 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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