Seiko Cal. 4536 - 497

The 4536-497 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4536 caliber with 23j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-0362d87b9111]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

70m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1965

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