M Midnight Rider "no dot" is a reference to the age of this particular knife. In this case, it's an early '70's era knife.Beautiful knife! What is a "no dot"?
Buck has a page with more info.

How Old is My Buck Knife? - Buck® Knives OFFICIAL SITE
How old is my Buck knife? We stamp symbols onto your blade to indicate when your knife was made. Refer to our Date Code Chart to find out the age of your knife.

There's also a sticky on this forum with some data on the 110/112. Additionally, I think someone made a webpage devoted to the 110 that I've seen linked here a couple times, but can't find at the moment. You'll have to do some digging, but it'll be fun if you like 110's.