How odd, I dont remember seeing that. I have just checked a photo of my one and it too has the same arrangement.
http://www.kbmuseum.org.uk/kb_images...1_chassis2.jpg
I didn't notice it because of the wax and fluff hiding the coil. I left it as it was in my radio as everything was working and my radios dont get used much.
My KB MP151/2 service manual shows this on the schematic but not on the component layout drawings.
The Trader sheet no. 1247, shows it as L6 & C14. L6 is described as modulation hum choke.
If you want to replace it, I would use the largest axial .1uF cap you can find and wind on a few turns of wire as in the original.
Mike