Seiko Cal. 5615 - 428

The 5615-428 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5615 caliber with 35j jewels beating at 21,600 bph, it delivers a 39 hours power reserve. [seikata-wm-b39399506c5c]

Also known as: Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

44mm

Case Thickness

10.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Black

Jewels

35j

Frequency

21,600 bph

Power Reserve

39 hours

Year

1968

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