In case of damage to property bearing a brand or the sale of which in any way carries or implies a guarantee of the supplier or Assured, the salvage value of such damaged property shall be determined after removal of all brands and any trade marks (on containers on which brand cannot be removed, contents to be transferred to plain bulk containers) which might be taken to indicate that the guarantee or brand of the manufacturer or Assured attached to said property. The Underwriters waive their right to take over any merchandise or containers from which it is impractical to destroy all evidence of the Assured’s connection therewith, such merchandise or containers to be destroyed.