Seiko Cal. 4528 - 880

Released in 1975, the Cal. 4528 with design code 880 was part of Seiko's domestic market collection. Powered by the 4528 caliber with 21j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-ec7968f297d4]

Also known as: Monster, Bullhead

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

45mm

Case Thickness

9.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1975

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