Seiko Cal. 4439 - 392

This Solar model from 1978 features a 45mm PVD Black case. Powered by the 4439 caliber with 36j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-e3395d273ecd]

Also known as: Sportsmatic

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1978

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