Seiko Cal. 4545 - 290

The 4545-290 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4545 caliber with 33j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-9552c723bee6]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

8.4mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1979

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