Wow!!! them are some awesome looking buttons... WTG!!!
You sure do get a wide veriety of targets over there...
What type of site were you hunting?
Good luck & Happy hunting~
They are hammered, the dates of the coins are beetween 1659-1668.
Write down in Google "boratynka", and you'll find some info about them.
It will probably be in Polish, but at last you will see how do the coin in a good condition looks like.
About the buttons.
Two of them (with double headed eagle) are Russian. Tsar's army, around 1890-1910.
Marine buttons came to Poland after the war. US government helped Poles by sending some support (food, clothes other stuff).
There were military coats too.
Tomorrow I'm leaving for Turawa, for a short holidays. A small town in Poland, nearby Opole.
Nice place to be, with a big lake.
I'll see what stuff is in the ground out there.
Pozdrawiam Matejko
Be back next Monday, if I find something I'll show you for sure.