Seiko Cal. 4420 - 691

Seiko 4420-691

This Hand-Winding model from 1968 features a 41mm Hardlex-Coated Steel case. The Bidirectional bezel and 41mm case give it a distinctive presence on the wrist. [seikata-wm-d0a50dcd4e20]

Also known as: Tuna

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
13.1mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Burgundy
Jewels
30j
Frequency
36,000 bph
Power Reserve
55 hours
Year
1968

Related Models

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