Seiko Cal. 5641 - 415

The 5641-415 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5641 caliber with 25j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-61eef63a309e]

Also known as: UFO, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

8.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

25j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1981

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