Seiko Cal. 6312 - 657

Seiko 6312-657

This Hand-Winding model from 1974 features a 46mm Hardlex-Coated Steel case. The Bidirectional bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-473686a86731]

Also known as: Tuna, Sportsmatic

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
13.4mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
30m
Dial Color
Cream
Jewels
34j
Frequency
28,800 bph
Power Reserve
56 hours
Year
1974

Related Models

seikata-wm-473686a86731