Seiko Cal. 6663 - 638

Released in 1978, the Cal. 6663 with design code 638 was part of Seiko's domestic market collection. The Coin-Edge bezel and 35mm case give it a distinctive presence on the wrist. [seikata-wm-fda9efcd8f42]

Also known as: Turtle, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

8.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

Black

Jewels

26j

Frequency

21,600 bph

Power Reserve

46 hours

Year

1978

Related Models

• Seiko 6684-219
• Seiko 5654-696
• Seiko 5643-990
• Seiko 6669-378
• Seiko 7190-699
• Seiko 4457-392
• Seiko 6310-448
• Seiko 4495-525
• Seiko 6175-918
• Seiko 4452-746
• Seiko 0784-520
• Seiko 6219-801