Very interesting set up...
I'll say!
Front disc, rear disc, *and* v-brake. Rear disc line runs through a seatstay braze-on.
Check out the single straight brace tying together the left side chainstay and seatstay.
Maybe mods done when Thorn had their on site frame shop? Paint reminds me of the old blue used on the xTc.
Also, *two* handlebars, the second apparently attached by cross-wrapped cable ries.
Best,
Dan.