Derek Magrath recently stumbled over this: "I saw this engine in the machine shop recently. It is owned by one of the engineers who works there and who is re-building it. He doesn't know anything about it, although he was told it was a marine engine - I'm not so sure. It looks like early vintage and French, to me, but I can't recognise it: can you?"
editor: let's see what the readers say, but it seems quite a challenge to restore an unidentified engien whout any knowledge about the specific engine. Of course there are many generic specifications, but still...