Seiko Cal. 3815 - 643

Seiko 3815-643

The 3815-643 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3815 caliber with 18j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-c88ab1cf3956]

Also known as: Bellmatic

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
13.7mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Bidirectional
Water Resistance
150m
Dial Color
Cream
Jewels
18j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1997

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seikata-wm-c88ab1cf3956