Seiko Cal. 5660 - 887

Seiko 5660-887

This Hand-Winding model from 1968 features a 40mm Hardlex-Coated Steel case. With its 21mm lug width and 11.3mm profile, it sits comfortably on most wrists. [seikata-wm-e3412a1c4fc6]

Also known as: Tuna, World Timer

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
40mm
Case Thickness
11.3mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
70m
Dial Color
White
Jewels
17j
Frequency
21,600 bph
Power Reserve
42 hours
Year
1968

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