Please see the most recent updates in the "Where did the .com name go?" thread. Posts number 16 and 17.
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Yes, Andy, it is a Caudron and part of the series that you mention. Thus your road from there to identification should be short and simple!
I knew what it wasn't, pinning down exactly what it was proved a little trickier, but I'm saying it is the Caudron CR.760.