Seiko Cal. 4539 - 820

The Seiko 4539-820 represents an important milestone in Seiko's 1978 lineup. It features a Navy dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-a0ee22f92ec1]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.3mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1978

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