Seiko Cal. 3840 - 556

The 3840-556 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 3840 caliber with 32j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-9da4b70789f7]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

8.2mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1995

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