I think meat in the jar is pretty, though not as pretty as most things canned up. I especially find the stock pretty....golden, amber, sometimes almost mauve...it's a pretty sight.
In the pic below, the older hens are in the jar on the left and the younger cockerels in the jar on the right...age definitely makes for a different product, a much more flavorful meat.
CX meat is not as dark as older, DP birds, so it's not quite as pretty a jar...sort of looks like a pathology specimen. They don't make as pretty stock either, light in color like the meat. Yield much more meat per bird, though, so if a person can hold them over until they are older and free range them for more flavor, they make a passable product....not my favorite, but still chicken.
@sumi , you can find older Ball or Kerr booklets on canning on Amazon and Ebay really cheap and the older ones are the more prized versions. They pretty much cover the basics on canning meat, so you can learn about canning at the same time you learn about canning meat. It's not rocket science and it doesn't have to be this rule bound scary process like most make it out, it's mostly just good ol' common sense.
If you've got common sense, canning comes easy....if not, it suddenly becomes this frustrating, fearful undertaking wherein one doesn't know what to do and which advice to follow.