150 119 is hard to judge since the photo is a little bleached on it's own but you might be right. 152 3.3. might just have some different shades though. Look at the area on the front half of the enginecowling for example.
I think it will be impossible to be certain of any of these schemes but at least we can be certain that it's Erla built aircraft we're dealing with.
Cheers! / Anders