Everest Extreme Endeavours, doubled, signed by Sir Edmund Hillary, Mike Westmacott, George Lowe and George Band

Everest Extreme Endeavours single stamp cover signed by Sir Edmund Hillary, Mike Westmacott, George Lowe and George Band. Featuring a single 1st class stamp from the Extreme Endeavours issue and a first day of issue postmark (29th April, 2003). Doubled with a 1st class Union Jack flag stamp and a 50th anniversary postmark (29th May, 2003). Also available signed by: Lowe, Westmacott, Band & Bonnington, Sir Edmund Hillary or Hillary, Lowe, Westmacott, Band & Scott.