In silver gold stacking vernacular, Junk Silver is colloquially referred to as old silver business strike coins that are meant as hard circulating cash with a silver commodity under .999 fineness.
My use of Junk Silver is a play on words of a silver coin featuring a Junk, that is a small wooden ship of South Asian origin having a characteristic design used in variety of marine and river functions of transportation and trade services.
I am part Chines so I am having some fun discovering and learning of my family history I hardly know of.
Thanks for dropping in @beatminister