Seiko Cal. 4430 - 506

The 4430-506 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4430 caliber with 36j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-2b4eb2c051d1]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

80m

Dial Color

Navy

Jewels

36j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1999

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