Seiko Cal. 3847 - 546

This Automatic model from 1975 features a 40mm Two-Tone case. Powered by the 3847 caliber with 17j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-335ee6dad24d]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.2mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Navy

Jewels

17j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1975

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