Seiko Cal. 4420 - 312

Seiko 4420-312

The 4420-312 is a sought-after Automatic piece from Seiko's golden era. It features a White dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-29b1681c6f29]

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
35mm
Case Thickness
11.8mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Fixed
Water Resistance
90m
Dial Color
White
Jewels
30j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1997

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