Seiko Cal. 6631 - 601

This Hand-Winding model from 1972 features a 36mm Titanium case. It features a Black dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-5676cfbb9bb8]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

36mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1972

Related Models

• Seiko 6180-454
• Seiko 4492-816
• Seiko 6156-607
• Seiko 7118-489
• Seiko 6676-591
• Seiko 3888-259
• Seiko 7043-710
• Seiko 5275-846
• Seiko 5667-228
• Seiko 6656-936
• Seiko 6674-906
• Seiko 7063-215