Seiko Cal. 3816 - 731

The Seiko 3816-731 represents an important milestone in Seiko's 1969 lineup. Powered by the 3816 caliber with 24j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-8f82f7c3ad01]

Also known as: World Timer, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1969

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