Seiko Cal. 4528 - 428

The Seiko 4528-428 represents an important milestone in Seiko's 1968 lineup. Powered by the 4528 caliber with 27j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-0e3cd850788e]

Also known as: Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

10.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

27j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1968

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