Featured Pablo Picasso Au Lapin Agile Sotheby's Auction Advertising Poster

I found this yesterday at my local thrift store - I liked it not only because it's a Picasso, but the way the colors pop & also the subject (sitting in a bar with a lady friend is usually fun but he looks miserable & she looks bored!).
It's also an unusual shape for a poster; almost square 21.5" x 22.5" and whoever had it framed did so with real glass.
All these things made me think I may have found something, but when I got home and I searched for Picasso Au Lapin Agile Sotheby's art auction advertising poster, but only found some print on canvas of the artwork + a Sotheby's auction catalogue that it was on the cover of.
Is this rare/unusual?
How many of these would Sotheby's make - and where would they go? (I can't see them in the window of a shop and thought maybe they were a small printing that they put around the auction house where it was being sold for TV camera glimpses?)
Any thoughts would be appreciated - thanks all!

 

http://cronnos.com.br/pablo-picasso-au-lapin-agile-sotheby-s-poster-1989-29-x-23-p-184860696126/

 

Unusual website!

 

I've done a little searching but haven't found any further information on this poster. Then tried to look for information on posters issued to advertise auctions. I found some, but not from Sotheby's. This gets into the general category of how auction houses advertise their sales.

 

It doesn't help at all, but I have the auction catalog. It was a big deal for them - hard cover, single item:


It has this photo of the café. That's the proprietor, Frédé, on the right with his guitar. (Photo can be found online.) Looks to me like he's the guy in the background of painting. Picasso's painting hangs on the wall in the background of the photo:

 

Very interesting. Thanks!

 

Very cool photo!

 

Hard to believe there's not more of these for sale or have sold - but better for me I guess!
Thank you!

 

It is important to remember that just because something is rare doesn’t automatically mean that it is valuable.

 

I've learned that!
Thanks Mark Lindon!