Seiko Cal. 6638 - 589

Released in 1965, the Cal. 6638 with design code 589 was part of Seiko's domestic market collection. Powered by the 6638 caliber with 27j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-6e28a22c6c8d]

Also known as: Helmet, Flighty

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

34mm

Case Thickness

11.1mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Cream

Jewels

27j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1965

Related Models

• Seiko 0747-999
• Seiko 5684-157
• Seiko 0720-119
• Seiko 5614-952
• Seiko 3863-401
• Seiko 0773-714
• Seiko 0770-322
• Seiko 5264-675
• Seiko 4465-590
• Seiko 6288-171
• Seiko 5253-666
• Seiko 4510-826