Seiko Cal. 4538 - 861

The Seiko 4538-861 represents an important milestone in Seiko's 1981 lineup. Powered by the 4538 caliber with 31j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-bf3a394ab383]

Also known as: UFO, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

40mm

Case Thickness

11.1mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

31j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1981

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