Seiko Cal. 6637 - 251

This Hand-Winding model from 1996 features a 36mm PVD Black case. Powered by the 6637 caliber with 30j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-9892c2f51b98]

Also known as: Panda, UFO

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1996

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