This excellent advert presents the November 1965 Sanko range in all its glory:

• The W twin cable model somewhat reminiscent of a Cyclo Standard.
• The SR, ST, H-1 and F-1 pull-chain models.
• The H-2 bell-crank design.
• The PA and PF parallelogram designs.
• And in the bottom right hand corner a new model that appears to be a derivative of the the Campagnolo Valentino - but with two sprung pivots. I do not know the model name of this marvellous object.

• Publisher: New Cycling
• Country: Japan
• Date: November 1965
• Derailleur brands: Sanko
• Derailleurs: Sanko PA and many others!