Seiko Cal. 6630 - 161

The 6630-161 is a sought-after Solar piece from Seiko's golden era. Powered by the 6630 caliber with 25j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-d5bb5eab42f4]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Champagne

Jewels

25j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1978

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