Seiko Cal. 6633 - 642

Seiko 6633-642

The Seiko 6633-642 represents an important milestone in Seiko's 1975 lineup. The Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-5473851cfe2f]

Also known as: Monster, Silverwave

Specifications

Movement
Hand-Winding
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
13.9mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
110m
Dial Color
Black
Jewels
18j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1975

Related Models

seikata-wm-5473851cfe2f