What will this 'fake'? AY-3-8910 reveal with acetone?

[ Update!
So it turns out these remarked chips are actually YM2149 sound chips.
The YM2149 is pincompatible, and sounds very similar, but has some minor differences that will still make it sound a bit different.
Some seem to prefer the YM2149 chip for the wider range of features.
Others just want the exact same sound as on the ZX Spectrum 128K models with AY-3-8912 soundchip.]

So after the previous video where I compare a 'cloned' (not sure what it is) AY-3-8910 chip, I did wonder if I could reveal what it actually is, just as plgDavid does in this video:    • "Fake" chips?  

I'm still not completely sure, it may be a YM2149F chip, according to the feedback to yesterdays video that I got from several people.