Here we are in December 1964, and here it is, the first advert for the SunTour Gran-Prix, the first derailleur with a slant parallelogram, the grand daddy of every quality derailleur made today.

I like the adjustable outer cable stop on the chainstay.

• Publisher: New Cycling
• Country: Japan
• Date: December 1964
• Derailleur brands: SunTour
• Derailleurs: SunTour Gran-Prix