Off the top of my head... Goin' Home, I'm Free, The Lantern, Yesterday's Papers. I'm sure there are others. Tremolo's a wonderful effect that for some reason guitarists don't use much anymore.
In the 60s Tremelo was a more common built in amplifier feature than reverb...and until Fuzz and then the "FX" bandwagon really beginning to roll with Cream & Hendrix, they were pretty much all you had to choose from.
[Unless you fancied trying to keep a Watkins Copycat working for more than five minutes at a time ;^) ]