Timeless quality not affected by time or change in fashion.
Parker knoll lounges full restoration. Client had these from his grandmother and decided to reupholster them. They are 88 years old almost 100 and I have never come accross a stronger wooden frame.
With its old plaid fabric is was sitting in the garage for years. Given a full refurbishment with a new neutral linen type fabric turned out amazing, I say it would last another 100 years.
See photos below: old plaid fabric – new neutral fabric.