Well, I bought the Soultown copy in the 70's, think it was 90p
To buy the Soundville Look-A-Like in the 70's I think was £1
the Soundville Look-A-Likes had a Full Label over a Tri-Center,
The Paper label would have needed to be sliced through with a sharp knife & plastic center & paper removed to make it Large center.
So I bought the Soultown copy &
I thought at the time that both were BOOTs 100%,
However, that stamp is Intriguing & apparently the same as The Sweets,
so the Soultown as a re-issue from Source, I would say is almost certain.