Seiko Cal. 3890 - 648

The Seiko 3890-648 represents an important milestone in Seiko's 1967 lineup. Powered by the 3890 caliber with 18j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-21c16c339780]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

44mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1967

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