Button Identification

[10th Michigan Infantry]

I've had these buttons here for a long time but I'm not quite sure if any of these are from the Civil War era or not. On the New York State Guard button from Waterbury, I think there used to be a chart somewhere on the back marks on those that I've since been unable to find. The other ones I have no idea what they are.

 

[Manassas 1861]

The third button is a NY state militia button, the last button looks like a Union army general service button.

 

[UCVRelics]

I've had these buttons here for a long time but I'm not quite sure if any of these are from the Civil War era or not. On the New York State Guard button from Waterbury, I think there used to be a chart somewhere on the back marks on those that I've since been unable to find. The other ones I have no idea what they are.
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The first one is a repop of a Rev war continental artillery button. The originals had a copper front and a wooden back. The second is post war Indian War period. The third is a CW period NY Stace Seal with a RMDC channel. The last one is some sort of something that looks home made cast as I have never seen a button like this.

 

[10th Michigan Infantry]

The first one is a repop of a Rev war continental artillery button. The originals had a copper front and a wooden back. The second is post war Indian War period. The third is a CW period NY Stace Seal with a RMDC channel. The last one is some sort of something that looks home made cast as I have never seen a button like this.

The last one really confused me too. It doesn't have any markings on it, so I have no idea. Thanks for the help though!

 

[R. Porter]

The last one looks like a general service button with no shield.