Jim Young 2.
The use of staples on antique items is a real ‘no no’, if it is tacked when stripped then tacks it is when it goes back!
As a upholsterer of over 50yrs I have to disagree with your statement. I understand its not original but had staple guns been around then they would most certainly been used.
The do far less damage to the wood being fine wire and give a double fixing instead of one. Unless specified its common practice to use staples to fix the cover and use tacks to fix the Hessian on the bottom .That way it still gives the appearance of being tacked while not doing any damage to the frame.
There would be far more antiques chairs around using staples instead of tacks.
Bob