Seiko Cal. 5640 - 280

Seiko 5640-280

The Seiko 5640-280 represents an important milestone in Seiko's 1999 lineup. Powered by the 5640 caliber with 32j jewels beating at 21,600 bph, it delivers a 56 hours power reserve. [seikata-wm-acfa43c5aaf0]

Also known as: Bullhead, UFO

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
41mm
Case Thickness
9.9mm
Lug Width
20mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
180m
Dial Color
Navy
Jewels
32j
Frequency
21,600 bph
Power Reserve
56 hours
Year
1999

Related Models

seikata-wm-acfa43c5aaf0