Seiko Cal. 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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