Seiko Cal. 5230 - 370

The 5230-370 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5230 caliber with 17j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-83fca766d64d]

Also known as: Monster, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1966

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