I picked this up out of an estate here in Indianapolis. I looked online and the only one I found was on loan from the Smithsonian. I really couldnt find out much more info on this piece. If you have any info please share. I would like to know what this came off of. One of the windows is missing the plexiglass. One thing I do know about this piece it is very heavy. I can wrap this up and put on a pallet at no charge. I listed this as Vietnam era based on the year Oct 61. Any information would be appreciated. The item “1961 Vietnam Bomber Stabilizer Periscopic Bomb Sight Type B1 USAF Air Force” is in sale since Monday, July 24, 2017. This item is in the category “Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Other Vietnam War Orig. Items”. The seller is “rjones2214″ and is located in Indianapolis, Indiana. This item can’t be shipped, the buyer must pick up the item.