The soil that you find them growing in has a whole lot to do with what the bark looks like and how big or small the rings are. That along with age of the tree and how fast it's grown.
Judging from the rings and my own personal experience cutting hedge here where I live I'd say that one was growing slow in fairly poor soil? Thicker rings indicate a wetter year or better soil, thinner rings indicate a dry year and poor soil.
You see how the rings are big for about the first 8 years or so when the tree was young, then as it got bigger and had more tree to take care of and supply moisture to all the branches and leaves, the rings got smaller because the tree was taking more out of the soil in the form of water and nutrients.
The hedge that I cut that's close to the river or in the flood plain where it gets lots of moisture and good bottom land soil has huge rings, are more straight, and the trees get monstrous. The ones I've cut up on rocky ground away from good soil and moisture where most of the rain runs off tend to be skinnier, more crooked, and the rings are tight.
I'm not a botanist or anything, that's just my personal experience with what I've cut here around our place.
Looks just fine to me though, should make some nice bows.