Seiko Cal. 4512 - 636

The 4512-636 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4512 caliber with 23j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-543887a8ad4c]

Also known as: Crown

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

130m

Dial Color

Black

Jewels

23j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1990

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