Seiko Cal. 3820 - 280

This Hand-Winding model from 1973 features a 37mm Two-Tone case. Powered by the 3820 caliber with 29j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-c4097e1f40dc]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

10.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

White

Jewels

29j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1973

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