Seiko Cal. 3820 - 915

The Seiko 3820-915 represents an important milestone in Seiko's 1974 lineup. Powered by the 3820 caliber with 27j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-180480c65af7]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Cream

Jewels

27j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1974

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