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Just having a look at your pictures. Is the upholstery leather, and if so is there any damage at all. Most leather of this age does tend to weaken and crack in places, showing the padding beneath.
It would be most unusual for leather of this age to be in any better condition than your chairs. I think that you should put them in a local auction. They are not without value. Whilst most old furniture is out of fashion, there is a tendency among some young (sometimes single) people furnishing their flats or first houses with this type of (still comfortable) easy furniture. My own daughter has a single leather armchair in her flat and she loves it. Beware though of the rules of auction houses regarding fireproofing of soft furnishings. If they will not accept your items then I still think that the right listing on Ebay or Etsy (buyer collect) would enable you to get something for the suite - or for individual items from the three. Still typing...
To help with your listing, the carved wood looks like oak and you would be right to call it a leather suite of the Art Deco period. Because there are young people who admire this sort of thing. Greg
Impossible for us to identify a manufacturer. We would describe it as 1920/1930s. Research into catalogues of suites from that period would no doubt discover very similar examples and with the leather covering and the carving, this was a very good quality suite. Sometimes (though rarely) close inspection of the underside of exposed woodwork will reveal stamps of manufacture and when these are found, it does enhance value. When my daughter was looking for a single armchair she expected to pay £80-£100 for something in your suite's condition. I wish that I could help more. Best wishes. Greg