Cheers dude, yeah it was a long shot. Basically if it's real, this mic is selling for £750 second hand on Ebay. It's around £1100 new from Studiospares. It has a lot of features, I want to check they all work correctly as I'm not familiar with using this kind of high-end gear, I guess if I took it to a recording studio and had a mess around with a sound tech / producer they'd be able to tell me but I'd likely have to pay for their time which I can't afford to do right now (just made an unexpected gear purchase, lol!)
I'll send off a message to Sony audio support I guess, at least they might know the best avenue to try.