This is the legendary Fidelity Research FR-1 MK2 designed by Ikeda.
Originally introduced in 1967, as an upmarket model at more than twice the price of the original MK1 version.
Wonderfully musical, the FR mated well with higher mass tonearms.
Despite the age, it nears the listener to the music, letting music to flow in a free way.
Another GREAT performer from the past.
Here some specs:
Frequency response: 20Hz~20KHz +0.5dB -0db
20KHz ~ 45KHZ +5dB -4dB
Channel Balance: within 1dB
Crosstalk: -27dB 1KHz~20KHz, -18dB 30KHz
Compliance: 10 X 10-6 cm/dyne
Output: 0.5mV 5cm/sec into 10 ohm load
Impedance: 10 ohms
Tracking Force: 2.0 grams
Cartridge weight 10 grams