When looking at bores, what is acceptable for condition. I mean ideally a mirror smooth bore with zero holes/deviations or grain separation is the target.
I was shining the bore and noticed it was a little rough looking. I am guessing this is from not being properly maintained, swabbing drying etc. Or just cumulative use over many decades.
I am wondering about the condition, will it have a  negatively impact its sound based on just looking at the pictures. Is it even viable to be put into play?
I don't think there is any real way to repair bore pitting is there?
These are the best pics I was able to get.

I'm fairly confident it's from the early 1960s.

I've never worked on a Signet but the Signet Special is regarded by most as a decent step-up model - something suitable for an advancing student's first wood clarinet. Selmer USA keywork was better in the early '60s than in later production, so this ought to be a good one to work on.

An old African American spiritual that I originally learned on recorder ages ago. I know it by heart so I thought I'd play it on the licorice stick. Good to play slow stuff, good practice.

https://youtu.be/lHF22OVf-5U

So small and yet so expensive...

These are cool. Probably 60s. Quality wise better than a Bundy but worse than an E11. It’s sort of like an advanced beginner instrument by all accounts