From my personal archives.

 Hi I'm Stephen Boros, the artist who designed these posters. They were published by Wex Rex in a limited edition of 200. I was lucky enough to meet Sinead and she loved the poster and signed a personal copy for me. I'm offering these at a very reasonable price because I'd rather fans had them instead of languishing in a drawer or trying to milk her legacy. This is your chance to have one directly from the artist that created it and while you can't have Sinead's signature, I can offer you mine. Just let me know in the notes whether you want my signature or not. I'm reducing the price since I found an additional stash of 6 in my print cabinet. These are absolutely the last ones available. Or make an offer.

 A note on the $8.00 shipping. The post office surcharges an additional $4.00 for 24" mailing tubes on top of the $4.25 shipping charge for a total of $8.25 plus the $2.00 cost of the maiing tube so I'm actually losing a little on shipping.

 Sinead O'Connor 1988 Boston Concert Poster - First Shows in America! 
(1st Print, Promoting shows for the Paradise, Metro and Axis)

100% Original. Not A Reprint Or Copy.
INCREDIBLY RARE AND HARD TO FIND - THIS POSTER NEVER COMES UP FOR AUCTION.

This poster advertises three shows in Boston at the beginning of 1988.
The Paradise show was broadcast live on Boston radio station WBCN and can be heard in it's entirety on bootlegs and YouTube.

Sinead had broken out on college radio and was fastly becoming huge in the US.
A handful of shows were arranged to get Sinead to the US to build on the excitement.
Before Boston she played a show in NYC and Philadelphia. The first of these Boston shows was just her third US performance.

It would be over a year later before Sinead commenced a proper global tour.
These Boston gigs were RARE one-off shows!
 
This original concert poster was commissioned to advertise the three Boston area performances: 3/31 at the Paradise, 4/1 at Axis and 4/4 at Metro.
As this poster was going to press "sold out" was added across the dates since the shows sold out faster than expected.
Very few of these posters were actually released, these were only posted in the box offices to notify patrons.

See photos for condition... 

Designer: Stephen Boros

Published by: Wex Rex
Year: 1988
Size; 14" x18.5"
Condition: Excellent Absolutely Pristine Mint