Seiko Cal. 5638 - 772

The Seiko 5638-772 represents an important milestone in Seiko's 1977 lineup. With its 21mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-85ee6bb7965c]

Also known as: Rally, Bellmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

41mm

Case Thickness

15.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1977

Related Models

• Seiko 0748-856
• Seiko 7169-165
• Seiko 5216-654
• Seiko 5275-324
• Seiko 7187-495
• Seiko 6349-197
• Seiko 0742-689
• Seiko 6183-630
• Seiko 5289-492
• Seiko 0733-511
• Seiko 0773-590
• Seiko 6691-349