Shabby but usable swivel chair (Leigh)

Ugly and shabby but usable swivel chair.
The chair has been well-used and was reliable for many years, but it has several cosmetic and functional issues. A few weeks ago I stained the seat which led to hand washing it in the shower, and although it seemed dry after a few days on a radiator, moisture continued to seep out when used. I attempted to speed up drying with a hairdryer and caused heat damage, melting the fabric and leaving a hole with dark, burned edges. Once the chair finally dried, detergent residue and pale stains remained on the seat.

Visually, the chair is far from perfect, but it can still be used comfortably if the seat is covered with a cushion, towel, or blanket. I continued using it this way for about a week before replacing it with a new chair, which is why I feel it's too good to throw in a dumpster. Chairs of this type can be expensive, and someone might still use it despite the flaws.

The lifting pump is a bit temperamental. It gets stuck and then it gets unstuck. But if you give it a few tries it eventually works. And the range of height is quite big, 40cm to 53cm. The lowest is good for a short person.
The base with wheels is strudy and works well.
However, the screw that should secure the backrest position doesn’t hold firmly, making the backrest somewhat loose, and it squeaks when leaned against. The backrest itself is not fully fixed because a screw went missing, so it can moves to sides and makes a cracking sound. Also the sponge of the seat is quite compressed and thin after long usage. But it needs a cusion on top to hide the hole anyway.

This description highlights every issue so that anyone considering taking the chair knows exactly what to expect.