You are purchasing a VERY SCARCE circa 1991 Baltimore Orioles Memorial Stadium Sports Viewer.  This is a very neat little item!  I believe this was a promo item, not distributed.  This is the Aerial View version of the viewer.  Viewer measures about 2 1/2 inches long.  Viewer is made of rigid white plastic.   Has Orioles logo on one side as shown.  Has Sports View Inc MLB 1991 on opposite side.  Viewer features an aerial photo of Memorial Stadium inside when you hold it up to the light.  Viewer remains sealed in original packaging as shown, never opened.   Packaging has minor condition issues.  Viewer itself is mint.  Great item for any Orioles fan!  Buyer pays $4.00 shipping.  Shipping combined on multiple lots whenever possible.  MN residents add 6.875% sales tax.  Thanks for your purchases!  Please check out my Ebay store for more great items!