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Voice coil should be under 30 ohms Field coil (if present) should be somewhere between 200-5000 ohms.
I've fixed and seen fixed speakers torn from the edge of the coil to the outer frame. If enough of the paper is there it can likely be fixed. Paper of that age can be a bit fragile so don't bend it too much...Gentle persuasion is the key to lining it up for gluing.
Repair is often as simple as a recap, or occasionally some signal tracing.
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