I'd guess it's one of the first ever built.
I was hired on as the maintenance manager at Aprovecho Institute in Oregon after Ianto Evans had moved on.
I had lived there for a few years as an intern and a renter and absolutely loved the place.
I was good friends with Larry Winiarski, Dean Still and Ianto Evans.
It was a J tube, metal drum riser,
cob bench system built into Ianto and Lindas
cob cottage at the top of the Aprovecho garden.
I lived in the
cob cottage after Ianto and Linda left.