Visual Guide to Defects and Imperfections in Good Delivery Bars

Welcome to the LBMA Visual Guide to the physical flaws - namely unacceptable defects and acceptable imperfections - which may be found in gold and silver Good Delivery bars. The purpose of the Guide is firstly, to assist refiners in understanding what is acceptable in London vaults and secondly, to provide London vault managers with a consistent basis for evaluating the quality of bars which they receive.

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