Seiko Cal. 4428 - 510

Seiko 4428-510

The 4428-510 is a sought-after Automatic piece from Seiko's golden era. The Coin-Edge bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-da0d7caea308]

Also known as: Navigator

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
8.4mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
Green
Jewels
17j
Frequency
21,600 bph
Power Reserve
65 hours
Year
1972

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