[Freols]

Hi there, first post here

I was wondering if you chaps could help me identify a red dot sight?
Here is a pic of it on an airsoft replica:


All I know is it is a Walther Top Point red dot sight of some sort, what I want to know is which "Top Point" it is and how much it is worth.

It does not look the the Top Point 1, 2 or 3 to me. I can't work out what it is

Any help would be appreciated!

Thanks,

-Freols