Seiko Cal. 6631 - 667

The 6631-667 is a sought-after Hand-Winding piece from Seiko's golden era. It features a Silver dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-2d3e42df3a47]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

8.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1968

Related Models

• Seiko 5259-727
• Seiko 4570-846
• Seiko 4424-846
• Seiko 6375-291
• Seiko 5652-391
• Seiko 7044-380
• Seiko 4432-965
• Seiko 6157-131
• Seiko 5225-182
• Seiko 6666-939
• Seiko 6139-720
• Seiko 5614-879