In this, advert from January 1963 Sanko make no mention of the Sanko PA, but instead list their series of pull-chain models. I have no idea what the text actually says, but I detect references to the H-1 the H-2, the S and the F-1 - because they are all named in Roman text in the line below the black bar containing the word ‘Sanko’. I suspect that the other two items in this line of text, which are described in Japanese only, are front derailleurs.

• Publisher: New Cycling
• Country: Japan
• Date: January 1963
• Derailleur brands: Sanko
• Derailleurs: Sanko H1, Sanko H2, Sanko S series, Sanko F1