Vintage 1950s Macys Bambergers Overcoat Topcoat Mongolian Cashmere Brown 44R
Looks to be bespoke/custom made, judging by the tailor's name being on one of the tags, as well as there being no size tag. Estimated to be a 44 based on the chest measurement.
I found a sold listing for a tweed herringbone blazer with the same exact black Macy's "Supre-Macy" tag that listed it as 1950s, so I'm assuming this is as well.
Union made in USA.

Super clean condition. If I had to nitpick, the right lapel has a small area of light pilling (on a dark coat like this it's unlikely to stick out at all) 
Otherwise excellent condition.