Cuhulin,

GE Superadio "I" and "II" Whip Antenna Question ?
http://groups.yahoo.com/group/longrange/message/407
http://groups.yahoo.com/group/SuperadioIII/message/1717

Most likely you have a replacement Whip Antenna the
'original' Whip Antenna had a Black Plastic sleeve over
part of the Whip Antenna.

IIRC - Both the GE Superadio "I" Model # 7-2880 and the
GE Superadio "II" Model # 7-2885 had a Black Plastic
sleeve over part of the Whip Antenna.

The Six (6) Photo-Images of this GE AM FM Superadio "I"
{ Super Radio # 1 } Model 7-2880B give a good idea of what
the Radio and the Whip Antenna 'originally' looked like.
http://cgi.ebay.com/_W0QQitemZ9740085519

FWIW - The GE Superadio "III" Model # 7-2887 simply has
a Longer Chrome Whip Antenna.

hope this helps ~ RHF