They had two earlier numbers Come Back and Love Stinks that charted pretty decently...
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And I believe “Freezframe” also?
“I Was Kaiser Bill’s Batman” by Whistling Jack Smith
https://www.youtube.com/watch?v=zQQ5sEOhbjQ
“Winchester Cathedral” by The New Vaudeville Band
https://www.youtube.com/watch?v=NnVYa2svIQQ