This is the first image actually taken from Jack and the Cuckoo Clock Heart, formerly The Mechanical Heart. It was published in a prospectus by Europa Films, showing off their releases for the rest of the year. I hope to find the actual prospectus and the other images.
In the text you’ll see the film compared to both Edward Scissorhands and Belleville Rendez-Vous. Because it’s French and features a mechanical character? Sounds about right.
Thanks to Animation Focus for the image.
The film was adapted by Mathias Malzieu from his own book, and co-directed by Malzieu and Stephane Berla. I hope it’s good- it looks a little cold, but that might be part of the style.