Thanks for the replies - see, I originally thought that they were all 60s, but then I always second guess myself when it comes to pumps because some of the 80's pumps can look similar! The top two have the little metal things at the tip of the toes that appear on the other 60s pumps that I have (no idea what they are called and they have rusted away slightly on the blue pair) so that pushed me even further towards that era, but I'm not sure when they stopped doing that so I went back to 80s!