Look closer guys, these are what I refer to as "square turned" because they are not turned at all. If you look at them they are square in section although at first glance appear to be turned. I've been asked to do similar before but have never actually figured out a way todo them on a standard lathe. I beleive the could be "thermed" if there was enough of them but they would originally have been made on a rotary cutting machine, which is a cross beteen a lathe and a spindle moulder, with spinning cutters that come in and remove wood.
Cheers
Richard