No from me - poor sketch IMO as well.
Thanks for your thoughts. Personally I think it might be good. It's clearly an abbreviated and rushed example, but the 'L' and the way it flows into the 'e' is very similar to several authentic Lennon's I've seen. The caricature - although rushed and slanted - has the correct formation.
I'd lean towards authentic.
This appears quite different.
I think this looks ok. Was it in an auction ?
I dont know much about the caricature, but I would not be surprised if the signature were deemed authentic.