Seiko Cal. 4537 - 378

The 4537-378 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4537 caliber with 17j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-9205325830a0]

Also known as: Monster, Tuna

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

38mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

190m

Dial Color

White

Jewels

17j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1974

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