Garrott P87 MC cartridge- specs anyone?

I've acquired a Garrott P87 MC cartridge, but cannot find specs on it anywhere. I've looked pretty extensively on the net, including the cartridge database on Vinyl Engine, but no luck.
Hoping someone can help.
Get in touch with the manufacturer.
I just put in Garrott Bros Cartridge in my search and got their page immediately. They have their e-mail addy on the first page. BTW the current line up includes P88 and P89, but no P87.
I have contacted Garrott, but they haven't bothered replying.
No worry, I made contact with an former employee of the company who was quite helpful.