I have a vintage dress coat with the label Yves Deflandre Paris. The coat is (I think) a figured velvet with Peter Pan collar and buttoned cuffs and button front closure, I bought it 2nd hand in the 1980s' but have not been able to find out anything about the label so hoping someone on here will have information.
I keep coming back to look at this coat. Judging by the print and tab insert on the back I would say 60s or early 70s on this coat. Hopefully, you may get a few more opinions.
I think you are probably right about the age, just want to find out more regarding Yves deflandre now.