Seiko Cal. 3817 - 753

This Spring Drive model from 1965 features a 44mm PVD Black case. Powered by the 3817 caliber with 25j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-ddcf0bcbd547]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

9.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

62 hours

Year

1965

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