Just looked at my records and that Gildkote full, sealed, box went for $3675 back in May 2019. The present auction has a bit earlier empty box from before Rustless priming, said to be from the 1929 GAH, and the copper plated shot is called Lubkote --

Attachment 75037

Already up to $600 with 18 days to go. I don't have access to a Peters catalog between 1926 and 1930 so have nothing to show such a box with that Lubkote name.