Seiko Cal. 6638 - 798

Released in 1991, the Cal. 6638 with design code 798 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 35j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-a7fee785fc19]

Also known as: Panda, Baby Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1991

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