Seiko Cal. 3864 - 820

The Seiko 3864-820 represents an important milestone in Seiko's 1996 lineup. Powered by the 3864 caliber with 36j jewels beating at 36,000 bph, it delivers a 42 hours power reserve. [seikata-wm-d28e0e704570]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1996

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