No pics provided, but there is a pic of this rare PTO here:
http://48cj2a.com/images/pto/Rhino/rhinowwarnod.jpg (it is mounted to the back of a Warn adapter that is mounted to the back of a Warn overdrive). The photo is from this great page for viewing different PTO options: http://48cj2a.com/PTOs.htm.

Here is another photo example from a different page that also includes a rebuild of a Rhino PTO: https://tantel.ca/Rhino%20PTO_2.html

And now for the Craigslist ad:

https://minneapolis.craigslist.org/wsh/pts/d/marine-on-saint-croix-rhino-pto-willys/7131133036.html

“Rhino PTO transmission for a Willys Jeep. Very rare. Needs bearings. Other willys parts for sale. $800 B/O Trade.”