Seiko Cal. 6633 - 312

Seiko 6633-312

The Seiko 6633-312 represents an important milestone in Seiko's 1990 lineup. Powered by the 6633 caliber with 33j jewels beating at 21,600 bph, it delivers a 46 hours power reserve. [seikata-wm-eb91e2e6ab56]

Also known as: UFO, Baby Tuna

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
46mm
Case Thickness
15.3mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Blue Sunburst
Jewels
33j
Frequency
21,600 bph
Power Reserve
46 hours
Year
1990

Related Models

seikata-wm-eb91e2e6ab56