Seiko Cal. 6641 - 633

The Seiko 6641-633 represents an important milestone in Seiko's 1998 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-150dfcd3747b]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1998

Related Models

• Seiko 4415-273
• Seiko 7015-792
• Seiko 4496-276
• Seiko 5662-360
• Seiko 4536-713
• Seiko 5228-605
• Seiko 6240-293
• Seiko 4475-748
• Seiko 5664-331
• Seiko 6315-265
• Seiko 0759-599
• Seiko 6141-702