Check out images of Josephine, 'Evijohill'. It is variable, but yours looks like one of its 'looks'.

Looks like Josephine to me!!

Josephine for sure... I have 2 of them growing in my garden. I also grow 22 other kind of clematis. Love them all. Madame de Bouchard is blooming until mid of November in zone 6 PA. Dehydrated cow manure by Twin Oaks (1-1-1 formula ) every spring is the success to growing clematis. I remove the old mulch in the spring, work the dehydrated cow manure into the soil - 6 inch away from the stems. I also add a bit of fresh new organic soil and bit of organic canadian peatmoss but cow manure works for all established clematis. Clematis needs humusy soil condition. If you have clay you need to remove the clay soil entirely and start with fresh new soil. Hope this advise helps. :-) Eva