Can anyone ID this? It's two foot long exactly. If you look in the centre circular glass you can see left or right. Not left and right. The two knobe are for focusing, Left knob, left focus. Right knob, right focus. It has the British arrow mark, and stamped on it is. TEL. DRILL. No 3. MK1. 1943. No 809. It's made entirely of Brass. I aquired it but aint got a clue what it is. Intrigued or what?
Nige.