Had these hanging around the house for years and never done anything with them.

Not sure of their use- they don't look like pro gear and don't look like anything from their domestic range either!

Doped paper cone

Rubber surround

Cast chassis

One of them very slightly scrapes when you push in one direction but mounted the other way up, it should be fine. The other unit is fine.

Nominal impedance would probably guess 15 ohms as you can see they are measuring circa 11

Collection from Braintree preferred due to complexity and bulk of packaging up