Seiko Cal. 4539 - 992

The Seiko 4539-992 represents an important milestone in Seiko's 1982 lineup. Powered by the 4539 caliber with 31j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-af6f4e9a5977]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

200m

Dial Color

Champagne

Jewels

31j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1982

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