My another successful hunt: Heavyweight Wool Coat by Folk! This is officially my favourite brand, I love everything in their products: design, material they are using, details, quality and fit.
The coat design is very minimal yet sophisticated with cool little features like leather strap and edge detail to the pockets or beige button to the collar.
This is the last year model and I was able to source it from a new to me french website (kind of a high fashion resale website) called Vestiaire Collective.
....and I'm out...