Guess the ISO. Quizz.

Hey Guys,
here is a small quizz for you.

Everone knows that night shooting and High ISO deteriorate image quality.

Especially it is visible in the fine details getting blurred by the excessive NR.

Can you gues ISO I used to make this shot without looking at the EXIF?

It is 100% crop from the original 14.3Mp image made with G1X (about 1/42th of the original image)
No RAW conversion, it is JPEG straight from the camera.

Hint: It is not ISO100.