Three antique 1800's US Coins

Description

1878 silver dollar (in case); 1883 silver dollar; 1877 seated Liberty half dollar
Additional information:
I am not a collector and don't know exactly what this means, but a collector that I have corresponded with describes the 1878
dollar as 7 feathers Very Fine-20 lightly toned. He also says the 1883 silver dollar can be described as very good, and the half dollar as good.