Seiko Cal. 6635 - 497

The Seiko 6635-497 represents an important milestone in Seiko's 1975 lineup. Powered by the 6635 caliber with 30j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-5ee12f38a312]

Also known as: World Timer

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

10.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1975

Related Models

• Seiko 7137-900
• Seiko 4453-799
• Seiko 4490-424
• Seiko 6126-697
• Seiko 6378-445
• Seiko 5240-581
• Seiko 4457-953
• Seiko 7143-191
• Seiko 6132-858
• Seiko 0726-318
• Seiko 6136-461
• Seiko 4439-932