Seiko Cal. 6681 - 392

The Seiko 6681-392 represents an important milestone in Seiko's 1970 lineup. Powered by the 6681 caliber with 18j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-492fc1384704]

Also known as: Sumo, Flighty

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

42mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1970

Related Models

• Seiko 6189-445
• Seiko 6299-930
• Seiko 4570-367
• Seiko 5262-352
• Seiko 7125-897
• Seiko 5254-957
• Seiko 6117-648
• Seiko 4483-221
• Seiko 6178-613
• Seiko 4414-245
• Seiko 6636-223
• Seiko 6348-941