This is a Grado Reference Master 1, which is a moving iron cartridge. This one has a 5mV output, and works into all standard 47KOhm mm phonostages. It is a high compliance cartridge and is ideally matched with low or medium mass arms.
I bought it from Adie 3 months ago, and have added no more than a further 20 hours.
See original sales thread for further details http://theartofsound.net/forum/showt...ighlight=grado
It is a lovely cartridge, particularly for the low asking price. I've inspected the stylus with a microscope and can confirm there are no signs of any wear.
Specifications here .... http://www.analogueseduction.net/all...cartridge.html
For sale £140 plus postage at cost (£7.25 Royal Mail guaranteed next day in UK).