How old are these chairs

Hi, I wonder how old these chairs are . It is my new project and I just want to know what I'm working with.
Thanks
Pictures in comments

 

Circa 1930, oak. Probably from an English dining set.

 

Do you know how much they can be worth it?

 

Value really depends on where you are. Here in my semi-rural Midwest US location, maybe $25-40.00 each in good upholstered condition at retail. Less at auction or other wholesale venues. If you have 4 or more, the value per chair usually goes up. In as-found condition as seen here, maybe $10.00 per chair if you can find someone who wants them. My understanding is that furniture such as this has little to no value in the UK. Here in the US, you might do a bit better in large cities than what I quoted you above.

For what it is worth, I really like these. However, the amount of upholstery on them and what it would take to redo them, kills the value. It is not a project I would take on for resale, as the amount of work needed to bring them to saleable condition would negate any potential profit.