Thanks Spence:
A little bit of earlier work a little bit of luck.
You are aware of my secondary research interest these last few years, US brand vehicles sold to, manufactured in or assembled in countries outside of the US. In this research, I became aware that Gläser built bodies on most GM and several other US brand chassis. They also favored that type of wheel cover. Anyway, I have assembled photo files of such overseas US vehicles by make, model year and coachbuilder and as it looked like a Gläser body to me, just clicked on that file name. There it was.
Keep up the good work.
Bill