Seiko Cal. 4577 - 634

Seiko 4577-634

The 4577-634 is a sought-after Solar piece from Seiko's golden era. Powered by the 4577 caliber with 29j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-bd34080df23c]

Specifications

Movement
Solar
Case Material
PVD Black
Case Width
41mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
160m
Dial Color
Silver
Jewels
29j
Frequency
28,800 bph
Power Reserve
61 hours
Year
1987

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