Seiko Cal. 6638 - 207

The Seiko 6638-207 represents an important milestone in Seiko's 1968 lineup. Powered by the 6638 caliber with 36j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-ad3ea3c712eb]

Also known as: Goldfeather, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

42mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1968

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