Post a few more photos, if you can. Can't quite make out the manufacturer, looks like Verket, but I'm only seeing the bottom half, so it's a partial guess.
Hard to tell from photos since there really is a good scale to compare it to. Looks military, but that doesn't mean much on it's own.
As for receiving...
Any conductive material will work as an antenna, but to varying degrees of effectiveness. Antennas are designed to be resonate on certain frequencies. The length of the radiator (vertical element) will dictate what frequency is resonates on. Without exact measurements and a bit more of a clue as to manufacturer, you are pretty much relying on someone having seen this model before to get an accurate description of what it is.