Seiko Cal. 4443 - 257

Seiko 4443-257

The 4443-257 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4443 caliber with 20j jewels beating at 36,000 bph, it delivers a 47 hours power reserve. [seikata-wm-1f89d9c74b55]

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
45mm
Case Thickness
9.8mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
100m
Dial Color
Green
Jewels
20j
Frequency
36,000 bph
Power Reserve
47 hours
Year
1972

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