Seiko Cal. 4538 - 961

The 4538-961 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4538 caliber with 33j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-2fbbe8ca8e2b]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.3mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1984

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