Dulcet/Mark - Pitch of the horn is determined by the barrel's bore as well as its length. This is discussed on our topic "Clarinettist with Conn 448N question".

So, with the bars all closed these days, you're stuck with this wreck. A Penzel may play out well afterall!

I don't believe that the bore texture effects the performance. Even if it's shiny smooth, it's quickly coated with droplets of water that get bigger, then drip down, altering the surface substantially. Do you, or anyone, notice a change in tone from dry to wet? I don't.

Its  penzel, I'm trying to revive it. To bottom joint is in good shape, the top joint as seen here, is a little rough. It absorbed roughly 12-14 ml of bore oil so far. It was really dry but seems to be almost rehydrated.
This has been a learning experience.
 My next trick is going to be finding or making the missing key.
I haven't been out to a bar in years       

I just bought a 424N made in 1951, with original barrel and Conn Steelay mouthpiece. It's one of the best made clarinets I've seen, and appears it was little-used.

I oiled the bore, did some needed regulating, and ... it was hard to blow, dull sounding with any MP. I wasn't happy (yet). But the intonation was good. I've found lately that my large-bore horns do best with a reduced-bore barrel. It seems to balance it out (matches the impedance, presumably).

So, I opened my junk box of old barrels. I tried the ones that fit its tenon. Lucky, I found one that plays like a DREAM. My experience may serve as an example, so here are the numbers ...

Upper joint of my 424N bore close to the top is 15.34mm (15 is considered large) The top flares out even larger. Also the bottom expansion is very large. This is a really large bore horn! – favored in the big band era.

Original barrel is 64mm X 14.9mm bore (verified elsewhere)
My "better" barrel is 63mm X 14.7mm bore   (both with no taper)

Now the tone is as good as I've ever produced AND the blowing is easy! The intonation is superb.

I had to try a bunch of mouthpieces. An old Noblet FRANCE 2V takes it to perfection (for a clarinet). With a steady embouchure, it rolls up the scale like butter.

My conclusion/advice:  Don't worry about the original barrel dimensions. Find something that WORKS! Of course its sockets need to fit (standards have varied much since old times). An invisible difference in bore makes an amazing difference in the result!

If you live in a large city, maybe a repair shop has a bunch of barrels to try? If you can get bore measurements, maybe someone here can help. I, or another techie on the list may be able to fit up the right thing. (For me, I would ask you to send me the instrument.) If you love the horn, it may be worth it.

If you are so inclined, I would may make suggestions based on your measurements. To measure bore, I use a machinist's telescoping "snap gauge" which I read with a micrometer or digital caliper. Wood is never round so find the average ID.

Forgive my ridiculously late response.  (I have been working solid 65-70 hour weeks for the last several months, and I have to remind myself to breathe some days.).
That chart is a gem, Windy.  Seems spot on, too.  I had a C-melody sax for a while.  I enjoyed it.  It would not tune well, but I enjoyed it just the same.  When mechanical tuning fails and when no clear remedy avails itself, we learn to adapt technique and embouchure to compensate. 
I admire your tuning skills.