Who made this chair?

This leather sling armchair is very well made. I believe it is oak and is exceptionally study with mortise & tenon joinery. I cannot find a maker's mark anywhere after close inspection. This chair is incredibly comfortable and must have been made by an experienced craftsman. I would like to know what "style" and era this chair is from. The brass tacks appear very old and have a nice patina. Any information would be greatly appreciated. Thank you.