Television Aerials
Albrecht 6577 Hyflex CL 27 BNC Antenna for Portable CB Radio
Frequency: 26 - 28 Mhz Length: 54 cm Impedance: 50 ohms
https://www.bizrate.co.uk/televisionaerials/albrecht-6577-hyflex-cl-27-oid4387275689.html