Seiko Cal. 4436 - 421

The 4436-421 is a sought-after Spring Drive piece from Seiko's golden era. With its 22mm lug width and 9.2mm profile, it sits comfortably on most wrists. [seikata-wm-dfc1d76b1c49]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

9.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1973

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