Hi Jeff, You are right. I have a few similar one's like your's. Made by the same company. I don't know the age of them but would guess 75 to 100 yrs old. It's a nice find. Probably a conductors button. I found one in northern p.a on a farm site. Same size style of lettering is different. My brother also has a few that are different in variations. There must have been alot of different types. Wonder if they hold any value. Sorry I couldn't tell you more. Nice button find to say the least.