Anyone know whos autograph this is? - and is it authentic?
 

Bottom right - there's some type of autograph that I don't normally see on these posters.

https://i.ebayimg.com/images/g/QVQAA...MY/s-l1600.jpg

Anyone know whos it is?

That looks like the John Hancock of Mirage Artist Mike Dooney.

I concur, def Mike Dooney.

It's Dooney of course.
Here's the complete artwork from the cover of the 1990 movie stickers album:
https://d1466nnw0ex81e.cloudfront.ne...00/1020067.jpg
I'm not sure why the signature is on a different position in the picture posted.
(Fun fact: there's a Puma blues poster on the background)

I seem to remember that particular image of Dooney's was also available as a wall poster tie-in for the first live-action movie (another variation appeared as the cover image to the first issue of the Welsh Publishing TMNT magazine). That might explain why the signature is in a somewhat different place, although I'm assuming that is printed onto the poster rather than being his actual autograph.

it isnt the exact same as the poster you posted. phish has a poster that doesnt have all the writing and no film strip style on the edges, instead its made to look more like a legitimate photo, its on a fairly thick cardstock and has a golden chrome frame. I have the same one from my childhood

I think he means the position is different. In one of the pieces the signature is right below Raph’s said and the other it is much lower if you take a closer look.

I know, the point im making is theyre two different posters just using the same base photo, ie "they changed it between the two versions", thus the autograph is scooted