Basically I second what Bowtie said, with a couple of additions.
I agree with him, that isn't an Altec crossover.
Not even sure the cabinets are Altec.
Yes, they may be original, but if so, they cabinets were probably built by the dealer. Was not uncommon.
Altec would even sell you the logos.
The cabinet bracing was done by a relatively inexperienced cabinet maker.
The fiberglass in the cabinet doesn't look Altec either. Altec typically did bottom, back, and one side. Seriously, I see nothing to make me think those are, or ever were, factory Altec cabinets.
Here is what I would consider a typical pair of what I am familiar with.
Altec LANSING VALENCIA 846A VOTT Speakers EXCELLENT Condition Photo #1489251 - US Audio Mart






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