Seiko Cal. 4521 - 577

Seiko 4521-577

The 4521-577 is a sought-after Automatic piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-e5de3d4757de]

Also known as: Tuna, Sea Horse

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
37mm
Case Thickness
9.2mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Inner Rotating
Water Resistance
180m
Dial Color
Silver
Jewels
34j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1993

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