I stumbled across a vintage glider facebook page

and that looks like a high dollar car, with the trunk lid removed, so it can tow a glider. That's rare.

I've only come across 2 cars that towed gliders, one was a Duesenberg that Howard Hughes used at his pilot training facility, it had a winch in the back

https://justacarguy.blogspot.com/2016/05/howard-hughes-had-this-duesenberg-body.html


the other was this Rolls Royce

https://justacarguy.blogspot.com/2016/04/1927-boat-tail-rolls-royce-20hp-sports.html

I have also posted about P38s and a C47 towing gliders into submarine pens, https://justacarguy.blogspot.com/2016/09/one-amazing-scoreboard.html 

and horses at a ranch in California towing a glider into flight.
https://justacarguy.blogspot.com/2017/05/i-dont-think-ive-ever-heard-of-horses.html

https://www.facebook.com/groups/www.vintagegliderclub.org/permalink/3410499555635352/