Seiko Cal. 4428 - 387

The Seiko 4428-387 represents an important milestone in Seiko's 1987 lineup. Powered by the 4428 caliber with 33j jewels beating at 36,000 bph, it delivers a 44 hours power reserve. [seikata-wm-36614506b38d]

Also known as: Bellmatic, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

45mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1987

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