Seiko Cal. 4537 - 991

The 4537-991 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4537 caliber with 29j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-bb24a0d054d9]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

8.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1995

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