It's an Orange Oakley Clockwork cro-mo frame. I bought it to replace a similar frame when that suffered a (probably) terminal failure.
The advantages of MTBs of that era are that they're pretty strong, pretty light, come with big clearances for mudguards and tyres, have braze-ons for racks and guards, and nowadays they're pretty cheap (though becoming less so). To buy something similar off the shelf would cost muchos dineros, so they're perfect for converting into go-anywhere tourers. With some slick tyres it's a nice ride on the road, too.
The bar ends are brilliant set to friction, and they were a bargain (I swapped them for a dying DVD player). I've routed the cables up to the stem; I always think it looks awful to have them splayed out from the hook of the drops, and I'd worry about catching them on passing obstacles.