Hi Guesty,
It has a side-wheel parallax and has 'custom shop' written across the objective lens in white - i'm looking at it now and i owe an apology to the previous posters who tried to tell me it was a 10-50x56mm. i can confirm that it is a 10-50. I don't know where i got 10-40x50 from - sorry for the confusion. You guys really know your stuff !- you told me what it is - and it's in front of me! If it's as good as you say then i will sell it 'cos i could never do it justice - i've had it for two years and i don't really use it - i didn't even know the magnification!
I'm not much of a paper-puncher (i am more of a hunting man) and, to be honest, this scope is way beyond use for normal 12fpe range airgum hunting so i'll probably put it on the private sales forum soon.
Thanks for the info
ATB, Nick.