Seiko Cal. 5691 - 435

The Seiko 5691-435 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-ccb4518ed812]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

39mm

Case Thickness

14.1mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

20j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1971

Related Models

• Seiko 5245-186
• Seiko 6626-148
• Seiko 4464-803
• Seiko 6381-841
• Seiko 6610-943
• Seiko 6245-415
• Seiko 0751-689
• Seiko 7144-246
• Seiko 6357-654
• Seiko 6330-443
• Seiko 6626-669
• Seiko 7169-479