Seiko Cal. 4436 - 972

The 4436-972 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4436 caliber with 30j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-3ea306fe1a25]

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

39mm

Case Thickness

14.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

White

Jewels

30j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1973

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