Seiko Cal. 3815 - 839

The Seiko 3815-839 represents an important milestone in Seiko's 1965 lineup. The Bidirectional bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-c3076116b280]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

12.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1965

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