Seiko Cal. 4581 - 503

The Seiko 4581-503 represents an important milestone in Seiko's 1965 lineup. It features a Black dial protected by a Mineral crystal and offers 40m of water resistance. [seikata-wm-bd669c20f58c]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.3mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1965

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