Here is the result of the capacitor check: ( all caps removed from circuit before checking.)
the two high value caps were Sprague 14 ufd 150 VDC. One measures 15.2 ufd with 0 ESR, the other 18 ufd with 0 ESR
All four of the 2 mfd caps were CDE rated 200 VDC. They were all pretty much spot on and all four had 0 ESR also on the meter. So none of them were leaky.
I decided that since 13 mfd is the correct value per the posted schematic for the crossover high value cap, to put new matched ones in for those two. To my surprise, I did decide the audio improved, notably. So I replaced the rest. My music test for speaker quality is Mozart's Clarinet Concerto in A Major. Having worked in antique radios for years, I had always thought that a cap was a cap, if it was good and on target for value. So my experience set me up to not expect an improvement in sound. I would have to say that the clarinet solos sounded crisper, not as diffuse and the orchestra just better. Maybe having gone to all the trouble we become biased to hear improvement, hard to say, this is not an A/B test clearly. In any case, certainly recapping does not in any way seem to degrade the sound, so I'm now a convert and will recap in future.
Some of you experts please look at the pic of the caps I removed and let me know if these were originals, or themselves replacements?? IMHO the soldering looked factory and undisturbed and have seen alot of radio chassis.
As far as the discussions about various brands of caps, it should be noted that there are only so many cap factories in the world, so the small volume higher end caps are probably made in someone's larger plant, like many craft beers.