Can anyone identify this pickup cartridge?

[Old Sparky]

                   
The cartridge has the number C60/ES etched into one side of it's metal frame, and what appears to be, in a stylised script 'Re /son' on the other.  It is a crystal type, mono pickup, whose single stylus closely resembles some Ronette styli

[Old Sparky]

The brand name is apparently 'Reson', and the cartridge may have originally been a turnover type, as, on close inspection, there appears to be a second stylus fitting point on the side covered by the riveted on fixing bracket, suggesting that it was modified for a particular application 'wd40addict' over on UKVRRR has posted that the cartridge is of German manufacture, possibly made by Steeg & Reuter.