The View-Master Model D (#2011) was produced between 1955 and 1972.
It was made from bakelite and was the only View-Master to have focusing eye-pieces. The lenses were oblong, rather than the more usual round shape. It ran from either 2 'D' size cells. The build quality was very high and it was considered to be the prestige item in the Sawyers range of viewers and still held in high regard by collectors to this day