Seiko Cal. 3840 - 623

The Seiko 3840-623 represents an important milestone in Seiko's 1972 lineup. Powered by the 3840 caliber with 32j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-48a306b318aa]

Also known as: Tuna, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

14.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1972

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