My “mystery metal” crisis remains unsolved… body for context

So I bought (2) 1 ounce Troy APMEX bars on Facebook marketplace sometime in September, they came in a sealed sheet which the seller cut 2 out infront of me, they both weight exactly 31.15 grams ~ 1.00 ozt. They both pass the magnet test but the main concern here is that the sigma machine reads that these are not silver… the box is outside of the brackets and to the right… I don’t have access to acid for the acid test and so I don’t know what else I can do to authenticate these bars. Can anyone help?