Potterton Gold 28 HE Combi - 47-590-06. Potterton Gold 28 HEA Combi (After Serial No BNF0932 & GNK0932) - 47-393-19. Potterton Gold 28 HEA Combi (Before Serial No BNF0932 & GNK0932) - 47-393-19 BEFORE.
eBay