I thought it was something and EDGE at first myself, but I'm pretty sure it's a Q and not a G. I'm probably wrong but just to be sure, I think I'll take it back apart in the morning and look again. It must be a G; a Q wouldn't make any sense. Since we know this thing was made somewhere between 1875 and 1886. I wonder if the style of lock would narrow it down any. Is this an early type or later; or would they just use whatever?