Seiko Cal. 5666 - 370

This Hand-Winding model from 1983 features a 40mm PVD Black case. Powered by the 5666 caliber with 31j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-f225e84bf1cb]

Also known as: Tuna, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

40mm

Case Thickness

9.3mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Green

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1983

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