Welcome to the forums Zaubermac! Yes, you found a nice early one for sure. The original matching sheath appears to be in good condition as well. The sheath design was changed fairly early in production because the retaining strap tended to get cut when the knife was removed and reinserted into the sheath. So the sheath in good condition is actually more uncommon than the knife.
Your knife is about 44 years old and not badly worn or abused at all, other than some patina and a few scratches. With the exception of the few remaining pristine unused originals, I am in favor of continuing to use these used knives. The blade may take a bit of work to sharpen, but it is the only way to truely appreciate the utility of the design. I personally don't worry about the patina on users. It helps to protect them from active rust. In fact, you can further force the patina by using the knife to make a BLT sandwich and letting it sit overnight before cleaning. The acids in the tomato and mayo work fast.
Everyone has their favorite sharpening methods. I use a Gerber diamond hone and finish with a leather strop. The brass can be left as-is or you can polish it with superfine steel wool or brass cleaner. Lightly oil the blade when done and, counterintuitively, don't store the knife in the leather sheath when not in use.
Thanks for showing us your knife and don't be a stranger here!
ETA: After reviewing my records, I can say with some degree of certainty that your #01347 knife was shipped to it's retailer in early 1967, some 1,237 having been shipped by the end of 1966.