I never noted that if you look at the A side label, there's a faded "Made In England" stamp on it. Between that and the US style date on the back cover, I get the feeling someone shipped copies to the US for sale. I got this copy in a Brooklyn record shop (probably a few miles from where it was sold originally) for less than £69... It was part of a decent haul at the shop (I acutally was looking for a Larry Harlow LP they had) when I managed to get part of our tax refund from my wife.
This predates ska. The track "Worried Over You" was a big hit in Jamaica. Also popular in the UK. Worried also showed up on an early JA hits LP, Jamaican Party Time with a small note on the "rhythm and blues" song on the back cover.