Signet MK 440 ML 1981 - Gold

Signet MK440 ML cartridge with ~100h using.

This is an elite line of Audio Technica products. The Signet brand was developed in the USA under AudioTechnica's supervision. It was sold at $700 USD, more than Koetsu's price at the time. The cartridge is in very good working and cosmetic condition, with 100 hours of playback.

Signet MK440ML it's an improved version of an Audio Technica AT-1000MC, sold for 1800-2500 euros.

Specifications:
5 Hz-50,000 Hz
Output: 0.1 mV
Tracks: 1.0-1.6g
Loads: 100 Ohms
Discharges: 15 Ohms
Compilance: 12

"...The fascination and truth behind the audio-technica AT-1000MC
The audio-technica AT-1000MC is a gold MC cartridge.
Known as one of the most famous cartridges of all time, it was born in 1981.
It features a rare dual voice coil power generation, and its diamond cantilever is pointed on two sides.
The integration of such exceptional technology into an extremely simple design is typical of audio-technica.
Output voltage is 0.1mV/1kHz 5cm/sec, and the playback frequency range is 10 to 50,000Hz, covering a broad spectrum.
Channel separation is 30dB/1kHz, and when considering channel balance, the specification of ±0.5dB or less/1kHz is more than adequate for the function.
Compliance is 12 x 10-6 cm/dyne, with a needle pressure of 1.3-1.6 g and a target value of 1.4 g.
Internal resistance is low (2.5 Ω) to reduce losses...."

I also have an MC elevator transformer from the same brand, Signet 12MK2, which generally accompanied this cell.