Thanks Graeme,
I rejected the C.61 'coz the pictures on AviaFrance shows a more prominent nose engine, skids between the mainwheels and a scalloped trailing edge, their picture of the C.81 looked a better fit, but Goggle was
ambigious, showing mixed captions for the same photo.
here's the C.81
Caudron C.81 - Transport civil - Un siècle d'aviation française=
This is their C;61
Caudron C.61 - Transport civil - Un siècle d'aviation française=
Edited to say thanks for the illustration, I've posted the two I found, I also think the exhust on the C.61 is very prominent too!
I hope
LM will return shortly and post my next challenge.