Everest Extreme Endeavours, doubled, signed by George Lowe, Mike Westmacott, George Band and Sir Chris Bonington

Everest Extreme Endeavours single stamp cover signed by George Lowe, Mike Westmacott, George Band and Sir Chris Bonington. 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). Available signed by: Sir Edmund Hillary, Hillary, Lowe, Westmacott, Band & Scott or Hillary, Lowe, Westmacott & Band.