Seiko Cal. 6657 - 444

Released in 1975, the Cal. 6657 with design code 444 was part of Seiko's domestic market collection. Powered by the 6657 caliber with 20j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-be8141abbf63]

Also known as: Pogue, Emperor

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.1mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Green

Jewels

20j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1975

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