Seiko Cal. 5623 - 503

The Seiko 5623-503 represents an important milestone in Seiko's 1968 lineup. Powered by the 5623 caliber with 33j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-c0c97876d2e9]

Also known as: Helmet, Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

45mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Champagne

Jewels

33j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1968

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