Seiko Cal. 6635 - 121

The Seiko 6635-121 represents an important milestone in Seiko's 1977 lineup. Powered by the 6635 caliber with 23j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-be97c1566b54]

Also known as: Silverwave, World Timer

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

90m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1977

Related Models

• Seiko 4479-369
• Seiko 4557-792
• Seiko 4462-605
• Seiko 5638-856
• Seiko 4561-926
• Seiko 7159-960
• Seiko 7157-628
• Seiko 3854-654
• Seiko 6340-828
• Seiko 7012-596
• Seiko 6693-987
• Seiko 7178-393