I have the same. You should check carefully, because it looks to me that there is a hole through the glass there.

For my part, I want to get the curly, pig tail short antenna that should screw into the piece you describe, just to get that vintage look.

Let me know if you see any suppliers of those antennas (when I asked at a local cell phone/radio shack place they looked at me saying -- whats a carphone).

alec

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84 300TD - 235k - Farbe "Surfblau" bought at 213k
87 300SDL - 131k - Farbe "PimpGold" bought at 115k
00 Klepper Faltboot Expedition Double