Seiko Cal. 6653 - 428

The 6653-428 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6653 caliber with 30j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-9753fbd1fabb]

Also known as: UFO, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

9.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1983

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