Seiko Cal. 3841 - 635

The 3841-635 is a sought-after Quartz piece from Seiko's golden era. Powered by the 3841 caliber with 35j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-b469416057a7]

Also known as: Tuna, Helmet

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1970

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