Seiko Cal. 4537 - 456

The Seiko 4537-456 represents an important milestone in Seiko's 1975 lineup. Powered by the 4537 caliber with 35j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-120520de5eaf]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

35j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1975

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