Need help understanding this crossover, then choosing speakers for mystery cab.

I have these 3-way cabs. They have 15" woofers. The mids and tweeters are horn type. They were given to me with not only the mids blown, but the mids and tweets replaced at some point with random speakers. I would like to get back to something that is closer as the one cab that is still working sounds bad, like way out of balance.

I figured that maybe the crossover specs would reveal something about the mid drivers and tweeter specs? I believe the original drivers were 8Ohm woofer, 8 Ohm Mid, and 6 Ohm tweeter.
 
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