Hahaha!
This was the famous "Dyna-Smock" of the '70's, which was available in both blue and orange.
My "payment" for my consultation service on the wardrobe was, of course, the patches. He sent them to me after filming was complete. They are now framed, and hang on the wall (right next to my original-from-the-movie "F+B Ambulance Service" patch.)
Steve, I think that the crews from Randallstown Ambulance wore the Dyna-Smock for their uniform back in the late '70s early '80s.
How did you get one of the "F+B" ambulance patches!? That's so cool!