Seiko Cal. 4541 - 646

The 4541-646 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4541 caliber with 23j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-a7973075d0a9]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

13.0mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1982

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