Seiko Cal. 6638 - 357

Released in 1998, the Cal. 6638 with design code 357 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 32j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-12cb1ff4b96d]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Burgundy

Jewels

32j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1998

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