Still not the worst advertising picture I've seen.
I'm still wondering where the 4th rein went - the curb rein on the off side appears to be missing.
It's there - just almost directly behind the one on the near side. You can see a little slice of it below the near side curb rein close to the bit, and an even smaller slice of it above the near side curb rein when getting close to the neck (the dark bit above the white reflection on the top of the near side rein.)
One of the worse photo choices was on the first edition of the "USDF Guide to Dressage". Guenter Seidel and Graf George, with a hollowed back and tilted head. Who knows, maybe because the horse wasn't btv in the ad someone thought it was good?
"I've spent most of my life riding horses. The rest I've just wasted". - Anonymous