Seiko Cal. 5617 - 421

The Seiko 5617-421 represents an important milestone in Seiko's 1993 lineup. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-7f29db2b981a]

Also known as: Helmet, UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

46mm

Case Thickness

13.2mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

19j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1993

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