Seiko Cal. 6639 - 503

Seiko 6639-503

This Hand-Winding model from 1968 features a 35mm Two-Tone case. With its 18mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-6d7a7236e0e7]

Also known as: Bullhead, World Timer

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
35mm
Case Thickness
8.0mm
Lug Width
18mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
White
Jewels
27j
Frequency
28,800 bph
Power Reserve
69 hours
Year
1968

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