Seiko Cal. 4438 - 928

This Spring Drive model from 1965 features a 45mm PVD Black case. Powered by the 4438 caliber with 35j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-53499b1d1cda]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1965

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