Seiko Cal. 4591 - 521

The Seiko 4591-521 represents an important milestone in Seiko's 1991 lineup. Powered by the 4591 caliber with 27j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-a4fd2db1034a]

Also known as: Monster, World Timer

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1991

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