Seiko Cal. 6638 - 705

The Seiko 6638-705 represents an important milestone in Seiko's 1989 lineup. Powered by the 6638 caliber with 33j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-81d9e4ef34c3]

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1989

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