"5 Grand", the 5000th B-17 Flying Fortress made in Boeing's Seattle plant after the attack on Pearl Harbor. All of the factory workers signed the bomber as it went along on the manufacturing line, and even some subcontractors put their signatures on the parts that they sent to the factory for this B-17. In the end there were 35 000 signatures on 5 Grand, and when it was ferried over the Atlantic, the crew found that the bomber was 7 mph slower than it was supposed to be thanks to the weight of the paint, and the signatures also caused extra drag, but nevertheless the bomber was never painted over or cleaned of the signatures.
5 Grand survived the war and there was some talk of turning it into a war memorial in Seattle, but it never happened due to lack of funds, and 5 Grand went to the scrapyard like most other B-17's.