Eeek, i bought a nikko sterling silver crown 4-12x40 scope (second hand-15months old in perfect aesthetical conditon) with the focusing objective lens that your turn and compare to the yardage on the scope to range find and i can hear a rattling inside it when i give it a little shake. The sound appears to be coming from where the adjustable turrets are at the centre of the tube, so i took off the covers and held them, it wasn't them moving and causing the rattling or the turrets, perhaps its something underneath the turrets? Can anyone shed any light on this?

p.s What's the Nikko Sterling official manufacturer site, i want to e-mail them.