Speaker Identification Help?

Hi, everyone! Hope you and your families are all safe and well.

I’m hoping you might be able to help me learn a little more about some speakers that were left to me by my father.

These three sets have been used in our family home for many years, but we no longer have a need for all three - and my father passed away a few years ago, so I don’t have access to any original information beyond what is on the units themselves.

The first two sets have model numbers clearly marked on them (Yamaha NS-200Ma and Infiniti 2500), but the third doesn't have any identifying markings. I’m wondering if anyone might be able to point me in the right direction.

This is a link to a Google Drive folder with photos of all three pairs in separate folders.

I’ve found some information regarding the 200/200Ma models online. Our pair is in perfect condition - and, if I were to hold onto one set, I'm inclined to keep those. I don’t know much about the Infiniti 2500s, and I don’t know why that tweeter is missing… 🤔

Ultimately, I’m most interested in identifying the unmarked pair - but any additional information that anyone might have on the Infinitis or the Yamahas would also be greatly appreciated as I try to determine which to keep and how to appropriately and fairly let go of the others (whether it be via sale or donation).

Thanks in advance for your time and help!

Sean