Shard of china salvaged from the wreck of the Cunard liner RMS Oregon back in the 1990s.  As you know, the Oregon was originally owned by the Guion Line and was purchased by Cunard.  Cunard, being rather frugal, continued to use the Guion Line china next to the new Cunard china they put on board.  This came with a large collection of salvaged items I purchased form the diver who recovered them, and the pattern on the edge matches other larger Guion Line pieces that were in the collection.  Measures about 6" x 4".