Take a look of this thread:

http://68kmla.org/forums/viewtopic.php?f=2&t=18240&p=171230#p171230

There you can see the excat same flag in the background. So 1985 makes lots of sense. My pictures on that thread are possibly from 1986 trade-show/exhibition or about that time. I need to talk to the guy i got the flag from, he should remember, everything.