Seiko Cal. 6635 - 128

The Seiko 6635-128 represents an important milestone in Seiko's 1970 lineup. With its 21mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-7c960b393cd7]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

41mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

36j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1970

Related Models

• Seiko 5665-609
• Seiko 6676-407
• Seiko 3877-510
• Seiko 4582-287
• Seiko 6280-556
• Seiko 4545-102
• Seiko 0744-540
• Seiko 0793-220
• Seiko 3885-463
• Seiko 6317-431
• Seiko 6244-961
• Seiko 5250-158