Seiko Cal. 6637 - 907

The 6637-907 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6637 caliber with 19j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-6283e17a3395]

Also known as: Monster, Bellmatic

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

43mm

Case Thickness

11.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1993

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