to me, looks like a 4600 red ambassaduer. bringing this back to good working condition is easy as long as there are no major parts that need replacement. you can do it with simple tools and household materials, and be done in one sitting without having to spend any money.
if i'm not mistaken, this model came out before instant anti-reverse were invented. you can check if by turning the handle backwards and see if there's any backplay on the handle before the anti-reverse engages.
also, i think this one has a line out alarm built in on the drag stack. check by loosening the drag and lock down the spool with your thumb, then wind the handle. if i'm right, you will hear the clicks. this is a nice feaure for bait and wait presentations (sound perfect for catfishing?). but it also means harder to find parts. it's sturdy though, so no worries.
if i am wrong about the two things above, then you have yourself a more "recent" model, which pratically makes it the same with a c3. the thing with abu is they made so many models that look the same on the outside. some external parts are also interchangeable.
for your reel, i'd say upgrade to a titanium levelwind guide (in case you will spool it with braid). buy a set of ceramic bearings. give the guts a thorough cleaning, lube everything that needs lubing, grease the drag just right and you are good to go.
ambassadeur sideplates can also be baught on ebay if you want a pretty reel.
the thing with abu is they made so many models that look the same on the outside. some external parts are also interchangeable.
