Seiko Cal. 3840 - 623

Seiko 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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