This is an officially licensed scale replica of the Star Trek Starships dedication plaque that appeared on the bridge of the U.S.S. Enterprise NCC-1701-D.
The U.S.S. Enterprise NCC-1701-D Dedication Plaque, which was designed for the show by scenic artist Mike Okuda, reveals the ship's launch date and features the names of many members of the production department. The plaque measure 210mm across.