The First 3 pictures are of a classic early Poma double chair. Note the floating
bullwheel. On the 3rd picture notice the later model Poma chair on the left with
side slats and a reinforced hanger arm. The 4th picture is the Poma drive. 5th is
the Poma double. 6th is a picture of an old tower from a second Poma double that
was removed. The pics 7-8 are a Borvig double. Pics 9-12 show a classic Hall
double (plastic seat later model) with Steve of chairlift.org.