Nice 3s, but unfortunate for the woofers issue. The woofer missing the surround with the foam ring around the dust cap is a correct 3 woofer, but the cloth surround has been removed. It was originally glued to the Masonite ring, which was glued to the basket. The 2nd woofer is a later model woofer. Maybe for the 3a, or another model. We would need to see the magnet and numbers. Being that the 3 is very desirable and valuable, you should really get correct woofers with the cloth surrounds. Occasionally I've seen these refoamed, but could never figure out why, unless they were severely damaged, or, look like yours. Woofers show up on eBay fairly often, so I'd start looking for good clean replacements.
The mids are known to have greatly diminished output due to the original white soft sealer around the dome base petrifying, which keeps the dome from moving. Roy C. rebuilds the mids, in fact he currently has a set of mine as well as my tweeters for restoration. Original mids are very difficult to find, and extremely expensive when they do show up. A set sold on eBay for 400 last month!
The pots are another known issue with many ARs as they corrode inside blocking the signal to the mids and tweeters. They often have no sound. Sometimes twisting the pot knobs back and forth a lot will find a spot bringing the driver back to life.
That wax block contains the caps. Replace them. Match the values printed on the block.
How are the cabs and grills? Please post pics showing their condition. Are you handy working with wood and finishes?
These will require a lot of work, and money to properly restore them back to close to original sound, but well worth it. I've got two sets, one fully restored, and they sound phenominal! Look on eBay to get an idea of the prices these command. You got yours for free!
The 3a restoration guide is an excellent guide to read and follow for repairs. Many can be applied to the 3.
Also, may I suggest you read through my 3 restoration thread here. Lots of good info you may find helpful.