Here I have a John Lennon serigraph titled "Whatever Gets You Through The Night" I purchased on Ebay a few months back.

It is reportedly signed by Ono, contains Lennon's embossed reproduction signature, chop mark, and a couple other embossed symbols in the lower right hand corner.

Included is a COA from Bag One Arts with a watermark and embossed logo.

I am curious if the serigraph is in fact signed by Yoko Ono in the bottom left corner.