Seiko Cal. 6638 - 163

The 6638-163 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 36,000 bph, it delivers a 51 hours power reserve. [seikata-wm-63e9162554ad]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

41mm

Case Thickness

8.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

51 hours

Year

1977

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