I will offer $ 50 in US Funds ( US postal money order) to the first one that can identify correctly the person that designed these chairs.
Yeah....looks like knoll. Here is one of mine with the same base.
oops....not sure what happened to the other two pictures. Sorry about that.
I would guess Kofod Larsen.
Not sure if this helps at all. Here is a similar one in plywood on 1stdibs.
Hey Zeph........I have a table like this of very similar construction. It is one of my repair projects.
I couldnt get any closer for the close ups to be able to tell what kind of wood it is.