Seiko Cal. 6631 - 871

Seiko 6631-871

The 6631-871 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6631 caliber with 19j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-a76286495000]

Also known as: World Timer, Sea Horse

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
12.6mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
160m
Dial Color
Navy
Jewels
19j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1989

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seikata-wm-a76286495000