Way way back, when Bill Ruger had just finished his first #1, he was leaning it up in the gun rack when old Alexander Henry, the janitor at the time, came through with his mop and bucket and knocked that rifle clean out of the rack. It came crashing down and put a chip in the forend. Bill kind of like they way it looked, so he kept it as a tribute to the now "late" Alexander. He sure did miss that janitor!
How do I know this is how it happened? Well, I was a consultant to Bill back in the day. I did it for free though, cause my day job was lining up hussies for JFK.