Seiko Cal. 4436 - 285

The 4436-285 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4436 caliber with 25j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-15bcb00cf1ae]

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

11.6mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1977

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