The 1991 RAF VC10 25th Anniversary Flown Signed Cover commemorates a significant milestone in military history. This collectable item features a certified original autograph from a private signing, adding a special touch to its significance. The cover celebrates the 25th anniversary of Operation Granby, making it a unique piece for any military enthusiast or collector. The fact that it was flown and signed further adds to its historical value, making it a prized possession for those interested in aviation and military memorabilia.