Andy Bowman of Vintage Tubes Services recommended Denon cartridges to me and he said that Denon always punched well above their price point relative to other phono cartridges. That cartridge in the photo definitely should be replaced, and I doubt that it left Denon looking like that. Most likely somebody has handled that cartridge since it left Denon.
My Denon DL-160 replaced a more costly Grado, and it is better than Grado in all respects. Any reputation of the MC being poor tracking or hyped in high frequency output is totally absent in my Denon. I will probably stick with Denon from here on out. I use a HW-19/PT-6 setup, and the Denon is a perfect match.