Looks a bit different than most, appears to allow the blade to free-float (disconnects the toplink) and has a hinged back blade - good OPTION if it can be LOCKED DOWN. Heres a google result, showing yours first and another they want $1500 for
https://www.tractorhouse.com/listin.../list/manufacturer/massey-ferguson/model/mf18
I like that ALL rippers can be raised/lowered with one control, most of the cheaper new ones make you treat each ripper separately. NO WAY I'd pay for that, when I'm seriously using my Gannon those rippers get raised/lowered (hydraulically) every few passes.
I gave $1400 about 12 years ago for the 7' gannon AND an OEM 3PH adapter (4 ckt hydraulics, adapter weighs around 500#) and still had to buy new rippers (about $150 at the time)
Both of the MF18's look pretty "rode hard and not put away at all) to me, but the first time you actually USE a brand-new one that purty paint WON'T be...
IMO, if you could bid under $600 and get it, it'd probably do what you need (and leave you $$$ for a TnT setup) ... Steve
Would the cutting edge need replaced something like this? Would it be available?