Seiko Cal. 4437 - 613

The 4437-613 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4437 caliber with 18j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-ad90062dba9b]

Also known as: Crown

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1970

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