> Most of these bars will still be acceptable in the London bullion
> market, even if they are not fully compliant with the LBMA’s current Good Delivery Rules,
> However, some of these “deep storage” bars may no longer be regarded as acceptable, either
> because of physical defects or poor marking.
What are "deep storage" bars?
The phrase is not in their definitions list:
Be your own banker. Keep value in your own hands.