1961 Sears!
1961 was Sears 75th anniversary,they introduced several appliances that year that were very unique, the washer and dryer, and the Lady Kenmore Whispertone vacuum, this had the distinction of being the first L shaped powerhead, along with having a pistol grip hose, a first in the industry, also, was the quietest vacuum on the market at the time, and also was a two speed machine!