Seiko Cal. 6687 - 310

The Seiko 6687-310 represents an important milestone in Seiko's 1979 lineup. With its 19mm lug width and 11.6mm profile, it sits comfortably on most wrists. [seikata-wm-439b73194abe]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

11.6mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1979

Related Models

• Seiko 6385-384
• Seiko 4428-101
• Seiko 7178-120
• Seiko 4596-533
• Seiko 6628-851
• Seiko 4545-551
• Seiko 6226-715
• Seiko 7156-260
• Seiko 6624-281
• Seiko 6216-591
• Seiko 4492-277
• Seiko 7175-144