Seiko Cal. 4421 - 337

Seiko 4421-337

The Seiko 4421-337 represents an important milestone in Seiko's 1969 lineup. Powered by the 4421 caliber with 28j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-5e87765f1b91]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
36mm
Case Thickness
12.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
70m
Dial Color
Cream
Jewels
28j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1969

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