Seiko Cal. 4521 - 726

The Seiko 4521-726 represents an important milestone in Seiko's 1967 lineup. Powered by the 4521 caliber with 28j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-a7ec874406c6]

Also known as: Baby Tuna, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

11.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Champagne

Jewels

28j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1967

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