Dutch supermarket chain Albert Heijn gave away free Thunderbirds technical sheets during 1966. A new sheet was made available once every two weeks, to qualifying customers, buying "Silver" or "Gold" Queen margarine. These large foldout single sheets had a colour cover and a black and white cutaway on the reverse. Each sheet was colour-coded, the first sheet issued was "Code Blue" (Thunderbird 1) followed each of the following weeks by "Code Green" (Thunderbird 2), "Code Violet" (FAB 1), "Code Red" (Thunderbird 3), "Code Yellow" (Thunderbird 4) and "Code Orange" (Thunderbird 5). Copyright was given as "A.P Films (Merchandising) Ltd, London / Production Sales Promotion Spits" This set is complete and in good condition. A great and rare add to any Thunderbirds collection!