Sanko love their text-intensive adverts - so, yet again, I am only guessing at what this one is about. I detect the following extensive range of rear derailleurs:

• S-1, S-2 and S-3. The difference is possibly the mounting. Compatible with 3, 4 or 5 speeds.
• Touring models ST-1, ST-2 and ST-3. The difference is possibly the mounting. Compatible with 3, 4 or 5 speeds.
• Racing models SR-1, SR-2 and SR-3. The difference is possibly the mounting. Compatible with 3, 4 or 5 speeds.
• F-1 and F-3. The difference is possibly the mounting. Compatible with 3, 4 or 5 speeds.
• H-1. Compatible with 3, 4 or 5 speeds.
• The PA parallelogram design. Compatible with 3, 4 or 5 speeds.

Sanko were not as geared to touring as SunTour - their widest ratio freewheel appears to be 14 to 24 teeth.

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• Publisher: New Cycling
• Country: Japan
• Date: April 1964
• Derailleur brands: Sanko
• Derailleurs: Sanko PA and others too numerous to mention