THIS IS AN ORIGINAL COLOR 1956 MAGAZINE AD FOR ALVIS LEONIDES AERO ENGINES FOR BRITISH HELICOPTERS.IT IS IN EXCELLENT CONDITION,MEASURING 8" X 11"...AD SHOWS ART WORK OF BRITISH HELICOPTERS AND DETAILED HELICOPTER ENGINE..HELICOPTERS FOR MAJORITY OF BRITISH HELICOPTERS........(POSTAGE ON 1 AD IS THE SAME A FOR 100)...CHECK OUT MY E-BAY STORE...NOSTALGIA AIRWAYS...FOR MORE HELICOPTER ITEMS.