Gordy;
If you remember back to the thread about the yellow GT that had been stored for like 23 years and was in prestine condition. It has it's original Hirschmann antenna. The antenna had a black plastic top that you could pop off and push the antenna INTO the fender so it wouldn't be damaged at car washes or by mechanics. Once you removed the top, you'd see a slot in the top of the antenna, this key was inserted into that slot, turned 1/4 turn and used to pull out the antenna from it's protective position. Look at my post # 38 in this thread:
http://www.opelgt.com/forums/introdu...l-miles-2.html