Seiko Cal. 5681 - 312

This Spring Drive model from 1981 features a 40mm PVD Black case. With its 18mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-9c1623d6cc59]

Also known as: Bellmatic, Navigator

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

40mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

30j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1981

Related Models

• Seiko 6215-889
• Seiko 6167-744
• Seiko 0776-103
• Seiko 6336-209
• Seiko 7179-421
• Seiko 4569-477
• Seiko 3885-841
• Seiko 5662-638
• Seiko 0760-764
• Seiko 0732-971
• Seiko 6686-470
• Seiko 5283-287