The image on this advert has reverted back from the SunTour Grand-Prix to the SunTour Gran-Prix. Who can understand it (or even cares)?

The derailleur names listed on the right hand side of the advert are (from top to bottom):

• SunTour Grand-Prix
• SunTour Competition
• SunTour Skitter
• SunTour Hero
• SunTour Echo
• A front derailleur whose name I do not know.

This is the first mention of the SunTour Hero in one of these adverts.

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• Publisher: New Cycling
• Country: Japan
• Date: March 1966
• Derailleur brands: SunTour
• Derailleurs: SunTour Gran-Prix, SunTour Grand-Prix, SunTour Competition, SunTour Skitter, SunTour Hero, SunTour Echo