Shure M91ED Phono Cartridge and Stylus * Very Low Hours * Possibly a NOS * See Video

The Shure M91ED is a vintage moving magnet (MM) phono cartridge featuring a 0.2 x 0.7 mil nude elliptical diamond stylus and a 5.0 mV output. It operates with a light tracking force of 0.75–1.5 grams, making it ideal for high-fidelity, low-wear playback, with a frequency response of 20–20,000 Hz and 25 dB channel separation. 

Key Technical Specifications
Type: Moving Magnet (MM)
Stylus (N91ED): 0.2 x 0.7 mil elliptical diamond (bonded or nude)
Output Voltage: 5.0 mV (1 kHz, 5 cm/sec)
Tracking Force: 0.75 to 1.5 grams
Frequency Response: 20 to 20,000 Hz
Channel Separation: 25 dB (minimum at 1 kHz)
Channel Balance: Within 2 dB
Load Resistance: 47 kOhm
Load Capacitance: 400-500 pF
Net Weight: 5.8 grams 

Features & Performance
Cantilever: Low-mass, rubber-mounted

Sound Profile: Articulate, smooth, and warm, often compared to the M97xE or V15 Type III