What does this linkage accomplish?

I was browsing Craigslist and saw this very nice-looking Sprite racer for sale (and fine garage companions, too).

https://fortcollins.craigslist.org/cto/d/drake-66-sprite-racecar/7736330205.html

One of the pictures showed this very interesting rear suspension linkage:

So, if this is a solid axle with leaf springs, what does that linkage do?

Is it a different kind of Watts linkage, to keep the axle from moving laterally?

This looks more complex, but maybe it saves space or has more ground clearance?

I sent that pic off to a couple of Sprite racers I know, we'll see what they think.

That's a Mumford link.  It makes suspension geometry nerds like me go "ooh" and "aah" because the roll center isn't defined by a pivot like a Watts link, but by the geometry.  You can put the roll center anywhere with a Mumford including below ground level.

The roll center is at the virtual intersection point of the two outermost links

(RC for Watts is at the pivot of the 'propeller'; RC for Panhard is where it crosses the vehicle centerline; RC for a 4-link is... "it depends")

http://www.bevenyoung.com.au/mumford.html

https://grassrootsmotorsports.com/forum/grm/mumford-link-how-you-do-that/41677/page1/

In reply to BoulderG :

Also known as a Rube-Goldberg device.

For those of us who are not suspension wonks, given any device with infinite adjustability options, I can guarantee that I will get it wrong an infinite number of times. And break it.