Seiko Cal. 3857 - 428

Seiko 3857-428

The 3857-428 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-e60d67b00b4b]

Also known as: Tuna, Sea Horse

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
42mm
Case Thickness
11.1mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
100m
Dial Color
Navy
Jewels
36j
Frequency
21,600 bph
Power Reserve
63 hours
Year
1977

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