Analogue Tracer Cartridges

I recently purchased a Nottingham Spacedeck/Spacearm table. With it came a Tracer #3 cartridge. I had a Dynavector cartridge that I am currently using but would like to find out a bit more (SOMETHING) about the Tracer. Alas, I can find virtually nothing - including a less than informative reply from the U.S. distributor regarding this cartridge. Anyone out there that can provide some detail or forward me decent links (oh, I have searched!)? I'd be obliged.
Nothing, eh? All I can find out is that the suggested starting point for the #3 tracking force is 1.7 grams.....
I read somewhere that the Tracers were based on the Goldring 1042, but I'm not sure.