The link has been taken down but the Koenig winches are beasts. Just a PTO winch with its own driveshaft from the T-case to the front of the vehicle. Common in the old rover crowd and gained popularity as they were installed on the two trucks that drove from London to Singapore.
I lived by atlanta custom creation in Atl and anything they sold was priced outrageous no matter the condition. They do some nice restoration work from what I could tell but stock 60s with rust selling for over $12k is ridiculous.