Cab Identification Please

Interesting, cant clearly make out the design principle from these photos alone, is it a TH of some kind? A rear loaded horn where the front of the driver is slotloaded back into the horn path near the aperture?

Definitely not a tapped horn. The patent for those (and the text book examples of precursors from the turn of the 20th century) are fairly clear on the requirements for that alignment.

It’s always hard to tell without seeing the profile but I’d suggest a band pass horn style loading, with a slot port cut either for an attempt to counter the limits of the very short horn or to provide cooling to the coil. Possibly aiming at the former but more achieving the latter.

That and the age or past life aside, I don’t see much that says branded build. Looks more of a DIY effort that’s used sensible handles and grille mounting? The connector plate is more of an indicator for that in my experience. The lack of castors or wheel board mount on a box that’s looking to be pretty heavy is another one.

It’s far too smoothly curved and lacking in angular bracing for a Flare box.

I presume it has access panels top and bottom? Pop them off, unload a driver, and get your pencils out to sketch dimensions and profile.

Eeeh where do you guys see a slot port? I see two slots for two drivers. No ports anywhere.

Thats what I thought i saw, but if there is no gap in there then this means it's some form of short flh, would be interesting to see a profile sketch.

In picture 4 I think I can see cable coming through the flare and across to the other driver. If there was a gap, surely it would go through the gap.

If you look at the second pic left box. It looks like there is a central horizontal rib that splits the ports to the rear of the drivers. I think they are ported horns. Also diy by virtue of the lazy routing of the speaker cables.