Apple iMac 27", Core i5-2500S, 4GB RAM, 1TB, UK (MC813B/A) [early 2011]
Apple iMac 27", Core i5-2500S, 4GB RAM, 1TB, UK (MC813B/A) [early 2011]
Apple iMac 27", Core i5-2500S, 4GB RAM, 1TB, UK (MC813B/A) [early 2011]
Apple iMac 27", Core i5-2500S, 4GB RAM, 1TB, UK (MC813B/A) [early 2011]
 
(The images do not necessarily correspond with the actual products)