These signals were also harvested from the steel mill. I don't need any more signals, but it was an all or nothing kind of deal. I've since cleaned them and besides the green piece, nothing really sticks out as note worthy. Have a PETTIGOAT in the bunch as well as an HGCO with no dots. Milk in a couple...rest are what you would expect. It was fun washing them off and holding them up to the light...hoping for something unusual. Thanks for looking.