Seiko Cal. 3873 - 509

The Seiko 3873-509 represents an important milestone in Seiko's 1977 lineup. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-04285a5febda]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

41mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1977

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