Seiko Cal. 4431 - 673

Seiko 4431-673

The 4431-673 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4431 caliber with 35j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-ea980698cddd]

Also known as: Silverwave, Bellmatic

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
40mm
Case Thickness
12.0mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
130m
Dial Color
Black
Jewels
35j
Frequency
28,800 bph
Power Reserve
41 hours
Year
1967

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seikata-wm-ea980698cddd