Seiko Cal. 0784 - 637

The 0784-637 is a sought-after Hand-Winding piece from Seiko's golden era. With its 20mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-cb3cf59369f0]

Also known as: Monster, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1970

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