Coins? Washers? How can I tell and how can I clean them?

[Jologan]

Found these buried deep in the ground! I wish I could see what the heck they are ... the silver one is very heavy and isn't magnetic, could it be something ? I included my
steel penny because I Also found it in my yard and it was so shiny 😲

 

[tamrock]

I just saw an episode of Pawn Stars and a guy brought a 1944 steel cent in the shop to sell. Wish I could find one.

 

[jewelerguy]

you dug that steel cent? the others just look like washers

 

[BigWaveDave]

You have three washers, and a steel cent that was dropped the day before you found it.

 

[Jologan]

No the others I dug... the steel cent was in my yard under my ac unit