Seiko Cal. 6661 - 610

The 6661-610 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6661 caliber with 29j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-a050e81e0c9b]

Also known as: Monster, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

12.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

110m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1993

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