Sansui Steve

Hi, I bought a pair of Klipsch KG-4 speakers and they do sound good with my 1968 Sansui 4000. The previous owner was an audiophile but had died so I cant get any background on a modification he had made. The horn tweeters had been replaced (with non-Klipsch) to smaller but much heavier tweeters. Anyone know from the pics below what the small one is or which is better or what they even are? I think the small ones have more higher freq output, are a bit louder, but maybe harsher too. Thoughts? Cheers, Steve