Seiko Cal. 4440 - 420

Seiko 4440-420

This Spring Drive model from 1999 features a 39mm Hardlex-Coated Steel case. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-9f44b4d55ca7]

Also known as: Silverwave, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
8.4mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Navy
Jewels
28j
Frequency
21,600 bph
Power Reserve
69 hours
Year
1999

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