Seiko Cal. 4491 - 155

This Hand-Winding model from 1977 features a 38mm Stainless Steel case. Powered by the 4491 caliber with 32j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-db799efd4a9c]

Also known as: Helmet, World Timer

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

32j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1977

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