greetings
I found some michigan state seal civil war buttons they were in a old soap tin at my grandmothers many have scovill backmarks the other ones have a backmark that read WH Thomas & co delphidelphia

we need help with the backmark so we are able to date them
8 coat buttons and 11 cuff or shoulder buttons

we are riverridge55 on yahoo chat if anyone can help us we have photos