These are the Tropic Shadows, one of my favourite reggae groups of the late `60s/early `70s.
They made a number of recordings during their existence - Anniversary (aka Our Anniversary), Bangarang Festival, Do What You Want, You Can Believe and a couple of others.
I believe they are the same band as Tropic Sunlight who recorded Labour Day for producer D C Anderson (compare Labour Day and You Can Believe and see what you think).
I notice Anderson also recorded two similarly named bands, The Tropicans and the Tropicsons but whether these were also The Tropic Shadows/Sunlight I don`t know.
Anyway, I tend to have a Lieutenant Columbo mind. Loose ends and unanswered questions bug me and it bugs me that I know almost nothing about this fine band.
If anyone does know anything about them, I`d be very pleased to hear from you.