I saw this old rifle the other day, too rusty to make out a serial number but must be a early Lincoln air rifle, But it has a type of trigger guard that I have not seen before. Normally the trigger guards have two screws which hold them onto the cylinder but this one only has one. Ill upload an image to show you. Anyone ever seen one like this before?

https://www.flickr.com/photos/152900...posted-public/