Hi sopotsopot,
Agreed with 'm and m' and I would rather teach you how to ID it yourself. The basic process is to first use RetroReveal to isolate and better see the cancel, then look up cancel.
How To Use RetroReveal
http://www.stampsmarter.org/learnin...oReveal.htmlHere is your image after it is run through RetroReveal, obviously a star cancel.

Then you can spend time trying to match the star patterns with one of the known ones. You can use this free online resource
http://stampsmarter.org/features/Fa...sicView.html1. Click on 'View By Subject' Button
2. Then select subject from drop down box. You will have to look through hundreds of cancels including cancels in the Subjects; 'Stars', 'Stars in Circles', 'Shaded Stars', and 'Unusual Stars'
Don