If the driver has a dimensionally equal "square" or cylinder shape, it's an alnico 802-8G.

If the driver is thin and looks like a 5/8 inch thick slab of ceramic between 2 steel plates, it's a 902'8A or B, and would indicate later models, but since you've already indicated alnico woofers the horn drivers are probably alnico 802's as well.

Just my .02 y'all understand............

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Born with a fork
in a world of soup

As bowtie said, look in to the driver past the screen if it is still there. You should see an orange phase plug with lines radiating from the center to the outer edge.