The phrase 'one chair' can be used in written English.
It can be used to refer to a single chair, either as a subject or object. For example, "I found one chair in the corner of the room" or "This chair is the only one I need."
The Russian guy in the cap was sitting on one chair, having given up his post on the curb.
They entered a small storage room of some kind; it held only one chair, on which a monkey was sitting.
On the back of one chair is his army uniform, washed and ironed since the war.
There's only one chair, so I sit on the floor and try to be small but supportive.
In fact, when Dickens drops in on them, there's only one chair in the house that's not wobbly.
We have one chair, one dresser (with a TV on top), one closet (for Carol) and two folding tables.
One chair ended up with cowhide upholstery and cowboy boots on its front legs.
One chair served as a nightstand.
One chair by Almodóvar's side remained open.
"There's only one chair," I'm told.
"Two don't fit in one chair".
