Seiko Cal. 3816 - 540

The Seiko 3816-540 represents an important milestone in Seiko's 1968 lineup. Powered by the 3816 caliber with 30j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-f3afcb47fb3f]

Also known as: Sumo, Goldfeather

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

10.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Green

Jewels

30j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1968

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