Thanks for that LM.
Still digging and learning all the time! I was involved in the "infernal combustion engine" business for more years than I care to remember, but I've only just found out that these Salmson radials didn't have the usual Master/Articulated Slave-Rod assembly, but had a patented (Canto-Unne) arrangement of gears to keep all the identical con-rods in respectable order and alignment. Judging by the numbers produced, they must have been fairly reliable but the system was ultimately abandoned.