Seiko Cal. 6638 - 677

This Solar model from 1971 features a 39mm PVD Black case. Powered by the 6638 caliber with 31j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-7f3a29558c67]

Also known as: Panda, Silverwave

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

39mm

Case Thickness

11.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

31j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1971

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