Signet phono cartridge info/help needed

My son has a Signet M R 5.0 Basic cart.

Does anyone have this or know about it?

What are the specs for this cart?

Where can I get info for this?

Any information on this will be greatly appreciated.

Thanks Rick.
I had a 5.0 basic and a 5.0 e, which had a supposedly better stylus,in the late 80's early 90's. I paid approx. $100-$150 for them, as I recall - heavily discounted from retail. First on a Pioneer, then on a Thorens td 316. Those were the days, man, those were the days.
It's a moving magnet, tracks at 1.5gr or more, Jerry Raskin's Needle Doctor didn't think replacement styli were made anymore. I think it was a good cartridge for the money, at the time, but certainly nothing special. I hope this helps. Good luck.
I have in hand a spec sheet for the MR 5.0 family from when I bought mine in '86.

The MR 5.0 basic:

Response: 15-25,000Hz
Seperation: 27dB @ 1kHz, 17dB @ 10kHz
Channel Balance: 1.5 dB
Tracking force: 1.3 - 2.3 grams
Stylus: 0.4x0.7 mil Elliptical, thin wall alloy tube
Output 5.0mV @ 1kHz, 5cm/sec
Recommended Load Impedence: 47,000 ohms
Recommended Load Capacitance: 100-200pF
Impedence: 900 ohms @ 1 kHz
Inductance: 550 mH
DC Resistance: 780 ohms
Weight: 6 grmas
Stylus: MRN 5.0 basic