Bunch of nice 5 cents or not? :s

[Mumra]

Hello so one of the things consuming my mind it seems is as soon as I see a coin is worth something my next thought is: is it a fake... so I've been studying how to do this. And it's a tricky subject I have found. And I am pretty new to this field so I would like to bounce a few things off of the experts on here. Thanks!

Ok so my newest problem: a bunch of maybe good American coins:

https://imgur.com/gallery/2SzTf

At first I thought the weights were out but I'm guessing they are within the limits? And the sizes are within limits as well? There's also nickel present too but I've not done any specific gravity test and I'm not sure it will help or not. So it feels like they could be real but I'm still not 100 percent. Any thoughts etc.? Thanks!