Good eye Largecar. 119 is a good number for your guess, but I wonder about the German flag (not exactly, but close). Michael Werner was my guess because he was a Merc guy and sometimes he ran under other numbers if he raced in different countries. In Europe he was normally 7. It might be that Kenny Kitson ran under a German flag in some U.S. race. This was common.

ADD: My mistake about the flag. It's vertical, and I thought later it might be Belgian, but it's not. Don't know what country that is.