The teak chair in the image above is one that I've owned for many years. I was fortunate enough to find a pair of these vintage teak chairs about 10 years ago and had them re-finished and re-upholstered. They are comfortable and work well with many different styles. Here is a picture of how they looked when I got my hands on them (and I can't believe I actually found this old picture):
Over the years numerous people have asked to buy them, and have asked me where to get them. You can search online shops, like ebay, to see what you can find in vintage teak chairs. The other option is buying new, often Design Within Reach has versions of these chairs, and a place I love in NYC, called 'Sit Down NY' also sells some great replicas.