Seiko Cal. 6671 - 633

The 6671-633 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6671 caliber with 19j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-9d66357aea17]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1976

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