Seiko Cal. 6631 - 745

Seiko 6631-745

The Seiko 6631-745 represents an important milestone in Seiko's 1984 lineup. Powered by the 6631 caliber with 35j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-69d78ea48f6f]

Also known as: Sportsmatic, Arnie

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
12.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
White
Jewels
35j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1984

Related Models

seikata-wm-69d78ea48f6f