Seiko Cal. 3898 - 730

The Seiko 3898-730 represents an important milestone in Seiko's 1978 lineup. Powered by the 3898 caliber with 23j jewels beating at 28,800 bph, it delivers a 47 hours power reserve. [seikata-wm-35fbf125beec]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

8.2mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Black

Jewels

23j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1978

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