Seiko Cal. 6637 - 216

The 6637-216 is a sought-after Hand-Winding piece from Seiko's golden era. With its 19mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-3618bad9303a]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1972

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