CW period button or other

[Jpro]

It's cuff size.tried my best to blow it up in photo. Back is unreadable , shank is still there somewhat. Anchor goes to edge thur stars and it's lined. Doesn't look like blazer button but could be wrong.

 

[duggap]

How about showing a picture of the back.

 

[Retired Sarge]

Looks like a Post Civil War, Federal Navy button.