The product is a rare and valuable WWII cover signed by James Tait DSO*** and Bob Knights, who were involved in the sinking of the Tirpitz. This collectable item holds historical significance as it is a certified original autograph from military personnel who served in the United Kingdom during the Second World War. The signatures add authenticity and uniqueness to the piece, making it a sought-after item for collectors of military memorabilia and autographs.