Ha! Welcome to the .264 realm. I have two - one of which is in CG63 configuration. I love them both. The 6.5x55 round is kind to the shoulder and is an accurate round. Those small diameter, but long, bullets can be had in weights from 80 to 160 grains. All sorts of reloading options exist and are well documented and proven. I opted to install MOJO sights on one of mine and have enjoyed shooting it at both paper and varmints. Yours appears a bit of a mixmaster, but like the 03 that should only affect resale value, not the gun's value as a shooter. Also, don't pay much attention to the disk marking. You can decipher it easily if you Google the topic, but it only indicates the wear of the barrel at the time of the last armorer's inspection. That could be 90 years ago! You're going to enjoy shooting that smokepole, Rick!
"Wars are, of course, as a rule to be avoided; but they are far better than certain kinds of peace." - T.R.