Seiko Cal. 4536 - 256

This Spring Drive model from 1974 features a 34mm Two-Tone case. Powered by the 4536 caliber with 33j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-6f1a0c0c7caf]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1974

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