Here's a pic of one of the newest members of my collection, a 1960's Hoover Suction Polisher model 5046A made by Hoover in France. It's a two brush, 250W machine. I have one it Green also,
I have this buffer which is made by Karcher Euro made for HMK here in the US but has been discountinue 2 years ago but I was so lucky to find it thru an ebay seller because You don't see these around at all, Mine is the first one that I see at all. I have to say it does an awsome job in fact I used it again today.
It seems odd to me that the suction polisher never took off in the states. The only time I ever saw one in the U.S was in an appliance store that specialized in "export appliances"-- meaning for people leaving the U.S. to live elsewhere.