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
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