Smile was the band that Brian May and Roger Taylor were in before Queen.
They were joined by Tim Staffell on bass and lead vocals. They released
one single with the tracks "Earth" and "Step On Me"(in the US only in
1969), and a Japanese mini-album called "Gettin' Smile" appeared in 1982
which had both sides of the single and 4 studio demos. The band was
unaware of its existence until they heard it. These tracks were also
recently re-released in Europe on a CD called "Ghost of a Smile".
There are records around of another band called Smile that was around much
later. If the recording is not one of the ones mentioned above, it's the
source: QMS FAQ