This Bridgestone advert is vaguely interesting - as it (blurrily) illustrates a derailleur that I do not recognise. It does not look quite like SunTour Skitter, a SunTour New Skitter, a Sanko PF or a DNB 66. Any suggestions would be gratefully received!

• Publisher: New Cycling
• Country: Japan
• Date: August 1965
• Derailleur brands: Bridgestone
• Derailleurs: unknown